<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/BusinessCombinations" xlink:href="livn-20190331.xsd#BusinessCombinations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/BusinessCombinationsContingentConsiderationDetails" xlink:href="livn-20190331.xsd#BusinessCombinationsContingentConsiderationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/BusinessCombinationsNarrativeDetails" xlink:href="livn-20190331.xsd#BusinessCombinationsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/BusinessCombinationsPreliminaryPurchasePriceAllocationDetails" xlink:href="livn-20190331.xsd#BusinessCombinationsPreliminaryPurchasePriceAllocationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/BusinessCombinationsPurchasePriceCompositionDetails" xlink:href="livn-20190331.xsd#BusinessCombinationsPurchasePriceCompositionDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/BusinessCombinationsTables" xlink:href="livn-20190331.xsd#BusinessCombinationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/CommitmentsAndContingencies" xlink:href="livn-20190331.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/CommitmentsAndContingenciesNarrativeDetails" xlink:href="livn-20190331.xsd#CommitmentsAndContingenciesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/CondensedConsolidatedBalanceSheets" xlink:href="livn-20190331.xsd#CondensedConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:href="livn-20190331.xsd#CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:href="livn-20190331.xsd#CondensedConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:href="livn-20190331.xsd#CondensedConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/CondensedConsolidatedStatementsOfIncomeLoss" xlink:href="livn-20190331.xsd#CondensedConsolidatedStatementsOfIncomeLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagement" xlink:href="livn-20190331.xsd#DerivativesAndRiskManagement" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementAmountOfGainLossRecognizedInOciAndIncomeStatementDetails" xlink:href="livn-20190331.xsd#DerivativesAndRiskManagementAmountOfGainLossRecognizedInOciAndIncomeStatementDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementDerivativeNotionalAmountsDetails" xlink:href="livn-20190331.xsd#DerivativesAndRiskManagementDerivativeNotionalAmountsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementFairValueOfDerivativeInstrumentsDetails" xlink:href="livn-20190331.xsd#DerivativesAndRiskManagementFairValueOfDerivativeInstrumentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementNarrativeDetails" xlink:href="livn-20190331.xsd#DerivativesAndRiskManagementNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementTables" xlink:href="livn-20190331.xsd#DerivativesAndRiskManagementTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DiscontinuedOperations" xlink:href="livn-20190331.xsd#DiscontinuedOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DiscontinuedOperationsDetails" xlink:href="livn-20190331.xsd#DiscontinuedOperationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DiscontinuedOperationsOperatingGainsAndLossesDetails" xlink:href="livn-20190331.xsd#DiscontinuedOperationsOperatingGainsAndLossesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DiscontinuedOperationsTables" xlink:href="livn-20190331.xsd#DiscontinuedOperationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/DocumentAndEntityInformation" xlink:href="livn-20190331.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/FairValueMeasurements" xlink:href="livn-20190331.xsd#FairValueMeasurements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/FairValueMeasurementsAssetsAndLiabilitiesThatAreMeasuredAtFairValueOnRecurringBasisDetails" xlink:href="livn-20190331.xsd#FairValueMeasurementsAssetsAndLiabilitiesThatAreMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/FairValueMeasurementsContingentConsiderationReconciliationDetails" xlink:href="livn-20190331.xsd#FairValueMeasurementsContingentConsiderationReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/FairValueMeasurementsTables" xlink:href="livn-20190331.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/FinancingArrangements" xlink:href="livn-20190331.xsd#FinancingArrangements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/FinancingArrangementsDetails" xlink:href="livn-20190331.xsd#FinancingArrangementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/FinancingArrangementsLongTermDebtOutstandingRevolvingCreditAndEuropeanInvestmentBankFinancingAgreementDetails" xlink:href="livn-20190331.xsd#FinancingArrangementsLongTermDebtOutstandingRevolvingCreditAndEuropeanInvestmentBankFinancingAgreementDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/FinancingArrangementsTables" xlink:href="livn-20190331.xsd#FinancingArrangementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformation" xlink:href="livn-20190331.xsd#GeographicAndSegmentInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformationChangesInCarryingAmountOfGoodwillDetails" xlink:href="livn-20190331.xsd#GeographicAndSegmentInformationChangesInCarryingAmountOfGoodwillDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformationGeographicAreasDetails" xlink:href="livn-20190331.xsd#GeographicAndSegmentInformationGeographicAreasDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformationSegmentInfoDetails" xlink:href="livn-20190331.xsd#GeographicAndSegmentInformationSegmentInfoDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformationTables" xlink:href="livn-20190331.xsd#GeographicAndSegmentInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/IncomeTaxes" xlink:href="livn-20190331.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/IncomeTaxesNarrativeDetails" xlink:href="livn-20190331.xsd#IncomeTaxesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/Investments" xlink:href="livn-20190331.xsd#Investments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/InvestmentsDetails" xlink:href="livn-20190331.xsd#InvestmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/InvestmentsTables" xlink:href="livn-20190331.xsd#InvestmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/Leases" xlink:href="livn-20190331.xsd#Leases" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/LeasesCashFlowDetails" xlink:href="livn-20190331.xsd#LeasesCashFlowDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/LeasesComponentsOfOperatingLeaseAssetsAndLiabilitiesDetails" xlink:href="livn-20190331.xsd#LeasesComponentsOfOperatingLeaseAssetsAndLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/LeasesContractualMaturitiesDetails" xlink:href="livn-20190331.xsd#LeasesContractualMaturitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/LeasesCostsDetails" xlink:href="livn-20190331.xsd#LeasesCostsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/LeasesFutureMinimumOperatingLeasePaymentsDetails" xlink:href="livn-20190331.xsd#LeasesFutureMinimumOperatingLeasePaymentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/LeasesLeaseTermAndDiscountRateDetails" xlink:href="livn-20190331.xsd#LeasesLeaseTermAndDiscountRateDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/LeasesTables" xlink:href="livn-20190331.xsd#LeasesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/NetIncomePerShare" xlink:href="livn-20190331.xsd#NetIncomePerShare" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/NetIncomePerShareNarrativeOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" xlink:href="livn-20190331.xsd#NetIncomePerShareNarrativeOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/NetIncomePerShareScheduleOfEarningsPerShareBasicAndDilutedDetails" xlink:href="livn-20190331.xsd#NetIncomePerShareScheduleOfEarningsPerShareBasicAndDilutedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/NetIncomePerShareTables" xlink:href="livn-20190331.xsd#NetIncomePerShareTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/NewAccountingPronouncements" xlink:href="livn-20190331.xsd#NewAccountingPronouncements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/NewAccountingPronouncementsDetails" xlink:href="livn-20190331.xsd#NewAccountingPronouncementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/NewAccountingPronouncementsTables" xlink:href="livn-20190331.xsd#NewAccountingPronouncementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/ProductRemediationLiability" xlink:href="livn-20190331.xsd#ProductRemediationLiability" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/ProductRemediationLiabilityDetails" xlink:href="livn-20190331.xsd#ProductRemediationLiabilityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/ProductRemediationLiabilityTables" xlink:href="livn-20190331.xsd#ProductRemediationLiabilityTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/Restructuring" xlink:href="livn-20190331.xsd#Restructuring" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/RestructuringNarrativeDetails" xlink:href="livn-20190331.xsd#RestructuringNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/RestructuringRestructuingAndRelatedCostsDetails" xlink:href="livn-20190331.xsd#RestructuringRestructuingAndRelatedCostsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/RestructuringRestructuringExpenseBySegmentDetails" xlink:href="livn-20190331.xsd#RestructuringRestructuringExpenseBySegmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/RestructuringTables" xlink:href="livn-20190331.xsd#RestructuringTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/StockBasedIncentivePlanCompensationExpenseDetails" xlink:href="livn-20190331.xsd#StockBasedIncentivePlanCompensationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/StockBasedIncentivePlanExecutedAgreementsDetails" xlink:href="livn-20190331.xsd#StockBasedIncentivePlanExecutedAgreementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/StockBasedIncentivePlanTables" xlink:href="livn-20190331.xsd#StockBasedIncentivePlanTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/StockBasedIncentivePlans" xlink:href="livn-20190331.xsd#StockBasedIncentivePlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/StockholdersEquity" xlink:href="livn-20190331.xsd#StockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/StockholdersEquityComprehensiveIncomeDetails" xlink:href="livn-20190331.xsd#StockholdersEquityComprehensiveIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/StockholdersEquityStatementOfStockholdersEquityDetails" xlink:href="livn-20190331.xsd#StockholdersEquityStatementOfStockholdersEquityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/StockholdersEquityTables" xlink:href="livn-20190331.xsd#StockholdersEquityTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/SupplementalFinancialInformation" xlink:href="livn-20190331.xsd#SupplementalFinancialInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/SupplementalFinancialInformationSummaryOfAccruedLiabilitiesDetails" xlink:href="livn-20190331.xsd#SupplementalFinancialInformationSummaryOfAccruedLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/SupplementalFinancialInformationSummaryOfInventoryDetails" xlink:href="livn-20190331.xsd#SupplementalFinancialInformationSummaryOfInventoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/SupplementalFinancialInformationTables" xlink:href="livn-20190331.xsd#SupplementalFinancialInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/UnauditedCondensedConsolidatedFinancialStatements" xlink:href="livn-20190331.xsd#UnauditedCondensedConsolidatedFinancialStatements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/UnauditedCondensedConsolidatedFinancialStatementsNarrativeDetails" xlink:href="livn-20190331.xsd#UnauditedCondensedConsolidatedFinancialStatementsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.livanova.cyberonics.com/role/UnauditedCondensedConsolidatedFinancialStatementsPolicies" xlink:href="livn-20190331.xsd#UnauditedCondensedConsolidatedFinancialStatementsPolicies" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/BusinessCombinations" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/BusinessCombinationsContingentConsiderationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionContingentConsiderationLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_12A28BBD3729F2D8B3946BB36C83D0E2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTable_4874B0882A43510D33186BB36C7F24B6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_12A28BBD3729F2D8B3946BB36C83D0E2" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTable_4874B0882A43510D33186BB36C7F24B6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_BF4013EB4633AD69914A6BB36C7FACF0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTable_4874B0882A43510D33186BB36C7F24B6" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_BF4013EB4633AD69914A6BB36C7FACF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_29657CA6F903D7D478256BB36C7F6ECF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_BF4013EB4633AD69914A6BB36C7FACF0" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_29657CA6F903D7D478256BB36C7F6ECF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_29657CA6F903D7D478256BB36C7F6ECF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_BF4013EB4633AD69914A6BB36C7FACF0" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_29657CA6F903D7D478256BB36C7F6ECF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputDiscountRateMember" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_B8C5CCBC8678D4747F146BB36C7FE56E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_29657CA6F903D7D478256BB36C7F6ECF" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_B8C5CCBC8678D4747F146BB36C7FE56E" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_MeasurementInputProbabilityofPaymentMember" xlink:label="loc_livn_MeasurementInputProbabilityofPaymentMember_08D4806FE6887B479D886BB36C801110" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_29657CA6F903D7D478256BB36C7F6ECF" xlink:to="loc_livn_MeasurementInputProbabilityofPaymentMember_08D4806FE6887B479D886BB36C801110" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:label="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_FDC228B31C68C85D1B276BB36C8014D5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_29657CA6F903D7D478256BB36C7F6ECF" xlink:to="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_FDC228B31C68C85D1B276BB36C8014D5" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_MeasurementInputCreditRiskDiscountRateMember" xlink:label="loc_livn_MeasurementInputCreditRiskDiscountRateMember_E779A0313CA800D245EA6BB36C802CC3" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_29657CA6F903D7D478256BB36C7F6ECF" xlink:to="loc_livn_MeasurementInputCreditRiskDiscountRateMember_E779A0313CA800D245EA6BB36C802CC3" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_MeasurementInputRevenueVolatilityMember" xlink:label="loc_livn_MeasurementInputRevenueVolatilityMember_E5F9BD96372ECC07C6416BB36C80925C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_29657CA6F903D7D478256BB36C7F6ECF" xlink:to="loc_livn_MeasurementInputRevenueVolatilityMember_E5F9BD96372ECC07C6416BB36C80925C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_E72A524B6B933AFAF7B56BB36C80F01D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTable_4874B0882A43510D33186BB36C7F24B6" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_E72A524B6B933AFAF7B56BB36C80F01D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9897DF548666D53BD846BB36C80A34F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_E72A524B6B933AFAF7B56BB36C80F01D" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9897DF548666D53BD846BB36C80A34F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9897DF548666D53BD846BB36C80A34F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_E72A524B6B933AFAF7B56BB36C80F01D" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9897DF548666D53BD846BB36C80A34F" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ImTheraMedicalInc.Member" xlink:label="loc_livn_ImTheraMedicalInc.Member_34E0459A79AF6D8844C66BB36C8125BA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9897DF548666D53BD846BB36C80A34F" xlink:to="loc_livn_ImTheraMedicalInc.Member_34E0459A79AF6D8844C66BB36C8125BA" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_TandemLifeMember" xlink:label="loc_livn_TandemLifeMember_A00437F226B2B27F4A2F6BB36C815A0F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9897DF548666D53BD846BB36C80A34F" xlink:to="loc_livn_TandemLifeMember_A00437F226B2B27F4A2F6BB36C815A0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="loc_us-gaap_ValuationTechniqueAxis_DF8AF5D795AB95B4618A6BB36C811174" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTable_4874B0882A43510D33186BB36C7F24B6" xlink:to="loc_us-gaap_ValuationTechniqueAxis_DF8AF5D795AB95B4618A6BB36C811174" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="loc_us-gaap_ValuationTechniqueDomain_B1FC6568885B5AA4C2166BB36C8156CD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_DF8AF5D795AB95B4618A6BB36C811174" xlink:to="loc_us-gaap_ValuationTechniqueDomain_B1FC6568885B5AA4C2166BB36C8156CD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="loc_us-gaap_ValuationTechniqueDomain_B1FC6568885B5AA4C2166BB36C8156CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_DF8AF5D795AB95B4618A6BB36C811174" xlink:to="loc_us-gaap_ValuationTechniqueDomain_B1FC6568885B5AA4C2166BB36C8156CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_57F8085892431DD875586BB36C820D7B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_B1FC6568885B5AA4C2166BB36C8156CD" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_57F8085892431DD875586BB36C820D7B" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ValuationTechniqueMonteCarloSimulationMember" xlink:label="loc_livn_ValuationTechniqueMonteCarloSimulationMember_7A48B09AB5F13002FD2C6BB36C823376" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_B1FC6568885B5AA4C2166BB36C8156CD" xlink:to="loc_livn_ValuationTechniqueMonteCarloSimulationMember_7A48B09AB5F13002FD2C6BB36C823376" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_B8A996123A7828D96B6F6BB36C8292B8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTable_4874B0882A43510D33186BB36C7F24B6" xlink:to="loc_srt_RangeAxis_B8A996123A7828D96B6F6BB36C8292B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_B73E04F0D81EF1BD4EDF6BB36C82F96C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_B8A996123A7828D96B6F6BB36C8292B8" xlink:to="loc_srt_RangeMember_B73E04F0D81EF1BD4EDF6BB36C82F96C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_B73E04F0D81EF1BD4EDF6BB36C82F96C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_B8A996123A7828D96B6F6BB36C8292B8" xlink:to="loc_srt_RangeMember_B73E04F0D81EF1BD4EDF6BB36C82F96C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_3C2CB434B472BFC00A7B6BB36C837F8A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_B73E04F0D81EF1BD4EDF6BB36C82F96C" xlink:to="loc_srt_MinimumMember_3C2CB434B472BFC00A7B6BB36C837F8A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_A9C335DCD16C3728CB376BB36C838288" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_B73E04F0D81EF1BD4EDF6BB36C82F96C" xlink:to="loc_srt_MaximumMember_A9C335DCD16C3728CB376BB36C838288" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationContingentConsiderationRegulatoryMilestoneBasedPayments" xlink:label="loc_livn_BusinessCombinationContingentConsiderationRegulatoryMilestoneBasedPayments_8907A7820204063D77C96BB36C8316B8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_12A28BBD3729F2D8B3946BB36C83D0E2" xlink:to="loc_livn_BusinessCombinationContingentConsiderationRegulatoryMilestoneBasedPayments_8907A7820204063D77C96BB36C8316B8" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationContingentConsiderationSalesBasedEarnout" xlink:label="loc_livn_BusinessCombinationContingentConsiderationSalesBasedEarnout_920F86CA5FB1C7E1467D6BB36C830331" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_12A28BBD3729F2D8B3946BB36C83D0E2" xlink:to="loc_livn_BusinessCombinationContingentConsiderationSalesBasedEarnout_920F86CA5FB1C7E1467D6BB36C830331" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_63034723E3FA0AFE80BD6BB36C8464EA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_12A28BBD3729F2D8B3946BB36C83D0E2" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_63034723E3FA0AFE80BD6BB36C8464EA" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ContingentConsiderationMeasurementInputs" xlink:label="loc_livn_ContingentConsiderationMeasurementInputs_96AF2FFFE2BD56DF0DA26BB36C8447AB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_12A28BBD3729F2D8B3946BB36C83D0E2" xlink:to="loc_livn_ContingentConsiderationMeasurementInputs_96AF2FFFE2BD56DF0DA26BB36C8447AB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/BusinessCombinationsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1FD302101C2F6DE9665C6BB36C9E03E3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1FD302101C2F6DE9665C6BB36C9E03E3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_CB3D4076DE6615BFA6DE6BB36C9F8164" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1FD302101C2F6DE9665C6BB36C9E03E3" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_CB3D4076DE6615BFA6DE6BB36C9F8164" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_252729569EAB4223B13F6BB36C9F9A86_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_CB3D4076DE6615BFA6DE6BB36C9F8164" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_252729569EAB4223B13F6BB36C9F9A86_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_252729569EAB4223B13F6BB36C9F9A86" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_CB3D4076DE6615BFA6DE6BB36C9F8164" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_252729569EAB4223B13F6BB36C9F9A86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_E9B89D95487B9DFC326E6BB36C9F0DBD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_252729569EAB4223B13F6BB36C9F9A86" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_E9B89D95487B9DFC326E6BB36C9F0DBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_3F9900E60E24AB9B672F6BB36CA0EF60" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1FD302101C2F6DE9665C6BB36C9E03E3" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_3F9900E60E24AB9B672F6BB36CA0EF60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D43F0DA1372C0E6BB0136BB36CA02484_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_3F9900E60E24AB9B672F6BB36CA0EF60" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D43F0DA1372C0E6BB0136BB36CA02484_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D43F0DA1372C0E6BB0136BB36CA02484" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_3F9900E60E24AB9B672F6BB36CA0EF60" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D43F0DA1372C0E6BB0136BB36CA02484" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ImTheraMedicalInc.Member" xlink:label="loc_livn_ImTheraMedicalInc.Member_4676E3F6D4467D9AACDC6BB36CA0782C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D43F0DA1372C0E6BB0136BB36CA02484" xlink:to="loc_livn_ImTheraMedicalInc.Member_4676E3F6D4467D9AACDC6BB36CA0782C" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_TandemLifeMember" xlink:label="loc_livn_TandemLifeMember_B6224575D561B1B31F1E6BB36CA0B5B9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D43F0DA1372C0E6BB0136BB36CA02484" xlink:to="loc_livn_TandemLifeMember_B6224575D561B1B31F1E6BB36CA0B5B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_16D1B38C5A71952820B56BB36CA17B4B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_16D1B38C5A71952820B56BB36CA17B4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_3E7D7017653E8EBE43D96BBEBF17FE2C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_3E7D7017653E8EBE43D96BBEBF17FE2C" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationUpfrontCosts" xlink:label="loc_livn_BusinessCombinationUpfrontCosts_575706ACAA80BC8026786BB36CA2A6AE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:to="loc_livn_BusinessCombinationUpfrontCosts_575706ACAA80BC8026786BB36CA2A6AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_13BB96B87B2FF812385E6BB36CA159A2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_13BB96B87B2FF812385E6BB36CA159A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_726FF0FA90B7B8FECD986BB36CA1DB05" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_726FF0FA90B7B8FECD986BB36CA1DB05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_A51761F0ED18E915330D6BB36CA13ACC" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_A51761F0ED18E915330D6BB36CA13ACC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_77D67FEBD0357C2488DA6BB36CA258FE" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_77D67FEBD0357C2488DA6BB36CA258FE" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationPotentialContingentConsiderationLiability" xlink:label="loc_livn_BusinessCombinationPotentialContingentConsiderationLiability_E18FDA890F2090A70E3D6BD38337B734" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5945EE7500262A8573A46BB36CA1C184" xlink:to="loc_livn_BusinessCombinationPotentialContingentConsiderationLiability_E18FDA890F2090A70E3D6BD38337B734" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/BusinessCombinationsPreliminaryPurchasePriceAllocationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2E09A0DF7B768D08957F69FC5D3890BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2E09A0DF7B768D08957F69FC5D3890BC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_75F19F281BA4AB028DB669FC5D3812A7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2E09A0DF7B768D08957F69FC5D3890BC" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_75F19F281BA4AB028DB669FC5D3812A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F732933E6047E28BE9C69FC5D3879F2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_75F19F281BA4AB028DB669FC5D3812A7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F732933E6047E28BE9C69FC5D3879F2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F732933E6047E28BE9C69FC5D3879F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_75F19F281BA4AB028DB669FC5D3812A7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F732933E6047E28BE9C69FC5D3879F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InProcessResearchAndDevelopmentMember" xlink:label="loc_us-gaap_InProcessResearchAndDevelopmentMember_A79E493C43C4EFD490C969FC5D38AFC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F732933E6047E28BE9C69FC5D3879F2" xlink:to="loc_us-gaap_InProcessResearchAndDevelopmentMember_A79E493C43C4EFD490C969FC5D38AFC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="loc_us-gaap_TradeNamesMember_5C0A3B459486BA84941E69FC5D39049F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F732933E6047E28BE9C69FC5D3879F2" xlink:to="loc_us-gaap_TradeNamesMember_5C0A3B459486BA84941E69FC5D39049F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_7DE406FBAD7772702D2D69FC5D39DB8B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F732933E6047E28BE9C69FC5D3879F2" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_7DE406FBAD7772702D2D69FC5D39DB8B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_053E63A5FF321F21AE5569FC5D3936B5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2E09A0DF7B768D08957F69FC5D3890BC" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_053E63A5FF321F21AE5569FC5D3936B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C33CD9C2509FD829E18A69FC5D3991AE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_053E63A5FF321F21AE5569FC5D3936B5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C33CD9C2509FD829E18A69FC5D3991AE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C33CD9C2509FD829E18A69FC5D3991AE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_053E63A5FF321F21AE5569FC5D3936B5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C33CD9C2509FD829E18A69FC5D3991AE" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ImTheraMedicalInc.Member" xlink:label="loc_livn_ImTheraMedicalInc.Member_0349AFB94B8DE5E1970469FC5D3942A5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C33CD9C2509FD829E18A69FC5D3991AE" xlink:to="loc_livn_ImTheraMedicalInc.Member_0349AFB94B8DE5E1970469FC5D3942A5" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_TandemLifeMember" xlink:label="loc_livn_TandemLifeMember_176DD28BC81F30B9F13469FC5D3A343A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C33CD9C2509FD829E18A69FC5D3991AE" xlink:to="loc_livn_TandemLifeMember_176DD28BC81F30B9F13469FC5D3A343A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementAxis" xlink:label="loc_srt_RestatementAxis_4A6B0585AA9D25D78F5769FC5D3BEFD3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2E09A0DF7B768D08957F69FC5D3890BC" xlink:to="loc_srt_RestatementAxis_4A6B0585AA9D25D78F5769FC5D3BEFD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_CB1DBB9B37D9326B4F1D69FC5D3B776E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_4A6B0585AA9D25D78F5769FC5D3BEFD3" xlink:to="loc_srt_RestatementDomain_CB1DBB9B37D9326B4F1D69FC5D3B776E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_CB1DBB9B37D9326B4F1D69FC5D3B776E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_4A6B0585AA9D25D78F5769FC5D3BEFD3" xlink:to="loc_srt_RestatementDomain_CB1DBB9B37D9326B4F1D69FC5D3B776E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ScenarioPreviouslyReportedMember" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_923407BEBDE6736899ED69FC5D3B5538" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_CB1DBB9B37D9326B4F1D69FC5D3B776E" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_923407BEBDE6736899ED69FC5D3B5538" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_BBDCF9D0ECC05AF08A1569FC5D3C4237" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_BBDCF9D0ECC05AF08A1569FC5D3C4237" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_94893B34E56EBE7A35DD69FC5D3C08A8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_94893B34E56EBE7A35DD69FC5D3C08A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_C1D4B933A59DD833F13069FC5D3C2C00" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_Goodwill_C1D4B933A59DD833F13069FC5D3C2C00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_EA18F12FEAE290CF6FE969FC5D3C65EF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_EA18F12FEAE290CF6FE969FC5D3C65EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_F2281311376EF0A3AB9869FC5D3D2864" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_F2281311376EF0A3AB9869FC5D3D2864" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory_54B883EA4A662BC3BBC669FC5D3DEC2B" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory_54B883EA4A662BC3BBC669FC5D3DEC2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_A0AB96EDF8C66D6F07E169FC5D3D5FB1" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_A0AB96EDF8C66D6F07E169FC5D3D5FB1" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxes" xlink:label="loc_livn_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxes_7AF9F62D4FEDC75D4C7F69FC5D3DC7C8" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_livn_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxes_7AF9F62D4FEDC75D4C7F69FC5D3DC7C8" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherNet" xlink:label="loc_livn_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherNet_D185E10AC69D87D6865869FC5D3D3EF3" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_livn_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherNet_D185E10AC69D87D6865869FC5D3D3EF3" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssetsAcquiredandLiabilitiesAssumedOtherNet" xlink:label="loc_livn_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssetsAcquiredandLiabilitiesAssumedOtherNet_76C69AEEC69189FC81DA69FC5D3DAFDD" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_livn_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssetsAcquiredandLiabilitiesAssumedOtherNet_76C69AEEC69189FC81DA69FC5D3DAFDD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_A6B0A7127623F4EC53D869FC5D3E3A4B" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_A6B0A7127623F4EC53D869FC5D3E3A4B" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets" xlink:label="loc_livn_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets_5934A9E878F89EB5FA5769FC5D3E9F8A" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_livn_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets_5934A9E878F89EB5FA5769FC5D3E9F8A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_527187DF504F814A8EE869FC5D3E5798" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9FC24A8E8CD6636CD8A769FC5D3C2541" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_527187DF504F814A8EE869FC5D3E5798" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/BusinessCombinationsPurchasePriceCompositionDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_837107A6F141806893EA71064B408297" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_436BECF0C59EFC09DF7871064B3F1A25" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_837107A6F141806893EA71064B408297" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_436BECF0C59EFC09DF7871064B3F1A25" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_859FD1A8E8DAB26E661A71064B3F9D26" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_436BECF0C59EFC09DF7871064B3F1A25" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_859FD1A8E8DAB26E661A71064B3F9D26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BB7CBA9A91460F39F6C771064B3FDB60_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_859FD1A8E8DAB26E661A71064B3F9D26" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BB7CBA9A91460F39F6C771064B3FDB60_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BB7CBA9A91460F39F6C771064B3FDB60" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_859FD1A8E8DAB26E661A71064B3F9D26" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BB7CBA9A91460F39F6C771064B3FDB60" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ImTheraMedicalInc.Member" xlink:label="loc_livn_ImTheraMedicalInc.Member_CEF5BCDCEB0A86D40C5171064B3FCFF8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BB7CBA9A91460F39F6C771064B3FDB60" xlink:to="loc_livn_ImTheraMedicalInc.Member_CEF5BCDCEB0A86D40C5171064B3FCFF8" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_TandemLifeMember" xlink:label="loc_livn_TandemLifeMember_3960A6FB2111D30E856B71064B405EC8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BB7CBA9A91460F39F6C771064B3FDB60" xlink:to="loc_livn_TandemLifeMember_3960A6FB2111D30E856B71064B405EC8" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationUpfrontCosts" xlink:label="loc_livn_BusinessCombinationUpfrontCosts_B2844066D680EB49606D71064B40A64D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_837107A6F141806893EA71064B408297" xlink:to="loc_livn_BusinessCombinationUpfrontCosts_B2844066D680EB49606D71064B40A64D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_92A7C39281796B56C4C471064B40EBCB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_837107A6F141806893EA71064B408297" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_92A7C39281796B56C4C471064B40EBCB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredIncludingEquityInterestInAcquireeHeldPriorToCombination1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredIncludingEquityInterestInAcquireeHeldPriorToCombination1_D2CCAB5384EF58EF295371064B409825" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_837107A6F141806893EA71064B408297" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredIncludingEquityInterestInAcquireeHeldPriorToCombination1_D2CCAB5384EF58EF295371064B409825" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_C26551DCBAD54966FF4171064B41DA17" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_837107A6F141806893EA71064B408297" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_C26551DCBAD54966FF4171064B41DA17" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_GainfromAcquisition" xlink:label="loc_livn_GainfromAcquisition_1DCCE4A290761604D33C71064B41B60B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_837107A6F141806893EA71064B408297" xlink:to="loc_livn_GainfromAcquisition_1DCCE4A290761604D33C71064B41B60B" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationCarryingValuePriorToPurchase" xlink:label="loc_livn_BusinessCombinationCarryingValuePriorToPurchase_399D1E0E568F5581242871064B41E0E1" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_837107A6F141806893EA71064B408297" xlink:to="loc_livn_BusinessCombinationCarryingValuePriorToPurchase_399D1E0E568F5581242871064B41E0E1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/BusinessCombinationsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/CommitmentsAndContingenciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentsLineItems" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentsTable" xlink:label="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxPeriodAxis" xlink:label="loc_us-gaap_TaxPeriodAxis_0D9EB2DB89DB9D257BB260B4F72BFBBD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:to="loc_us-gaap_TaxPeriodAxis_0D9EB2DB89DB9D257BB260B4F72BFBBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxPeriodDomain" xlink:label="loc_us-gaap_TaxPeriodDomain_00022CEF8EF9009F3ECB60B4F72B4E3A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxPeriodAxis_0D9EB2DB89DB9D257BB260B4F72BFBBD" xlink:to="loc_us-gaap_TaxPeriodDomain_00022CEF8EF9009F3ECB60B4F72B4E3A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxPeriodDomain" xlink:label="loc_us-gaap_TaxPeriodDomain_00022CEF8EF9009F3ECB60B4F72B4E3A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxPeriodAxis_0D9EB2DB89DB9D257BB260B4F72BFBBD" xlink:to="loc_us-gaap_TaxPeriodDomain_00022CEF8EF9009F3ECB60B4F72B4E3A" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_TaxYears20022006Member" xlink:label="loc_livn_TaxYears20022006Member_FF7144B9B02AC3AB163360B4F72C4178" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_00022CEF8EF9009F3ECB60B4F72B4E3A" xlink:to="loc_livn_TaxYears20022006Member_FF7144B9B02AC3AB163360B4F72C4178" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_635D519363823ABABFF160B4F72C0A58" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:to="loc_us-gaap_StatementScenarioAxis_635D519363823ABABFF160B4F72C0A58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_B4A959153ADF8D5720CB60B4F72C41E2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_635D519363823ABABFF160B4F72C0A58" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_B4A959153ADF8D5720CB60B4F72C41E2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_B4A959153ADF8D5720CB60B4F72C41E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_635D519363823ABABFF160B4F72C0A58" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_B4A959153ADF8D5720CB60B4F72C41E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_F2F167D10DD2F8D81C7C60B4F72CC590" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_B4A959153ADF8D5720CB60B4F72C41E2" xlink:to="loc_us-gaap_ScenarioForecastMember_F2F167D10DD2F8D81C7C60B4F72CC590" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_99597C04B4ADCC3DF6EE60B4F72D3CB2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_99597C04B4ADCC3DF6EE60B4F72D3CB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_B6110E30B04DDC57907560B4F72DFB09_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_99597C04B4ADCC3DF6EE60B4F72D3CB2" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_B6110E30B04DDC57907560B4F72DFB09_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_B6110E30B04DDC57907560B4F72DFB09" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_99597C04B4ADCC3DF6EE60B4F72D3CB2" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_B6110E30B04DDC57907560B4F72DFB09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_53821B360FD3A1AE716A60B4F72D95F6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_B6110E30B04DDC57907560B4F72DFB09" xlink:to="loc_us-gaap_SubsequentEventMember_53821B360FD3A1AE716A60B4F72D95F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_LitigationCaseAxis" xlink:label="loc_srt_LitigationCaseAxis_A813CBE8E1D5F6E897BF60B4F72DA857" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:to="loc_srt_LitigationCaseAxis_A813CBE8E1D5F6E897BF60B4F72DA857" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="loc_srt_LitigationCaseTypeDomain_4B740FAFDB3CCBD00C8160B4F72EA3C1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_A813CBE8E1D5F6E897BF60B4F72DA857" xlink:to="loc_srt_LitigationCaseTypeDomain_4B740FAFDB3CCBD00C8160B4F72EA3C1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="loc_srt_LitigationCaseTypeDomain_4B740FAFDB3CCBD00C8160B4F72EA3C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_A813CBE8E1D5F6E897BF60B4F72DA857" xlink:to="loc_srt_LitigationCaseTypeDomain_4B740FAFDB3CCBD00C8160B4F72EA3C1" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_FDAWarningLetterMember" xlink:label="loc_livn_FDAWarningLetterMember_29C4BE6A35739B64FDBC60B4F72E5676" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_4B740FAFDB3CCBD00C8160B4F72EA3C1" xlink:to="loc_livn_FDAWarningLetterMember_29C4BE6A35739B64FDBC60B4F72E5676" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ProductLiabilityMember" xlink:label="loc_livn_ProductLiabilityMember_7A0F9D721AC1FB12D68960B4F72EE079" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_4B740FAFDB3CCBD00C8160B4F72EA3C1" xlink:to="loc_livn_ProductLiabilityMember_7A0F9D721AC1FB12D68960B4F72EE079" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_SNIAMember" xlink:label="loc_livn_SNIAMember_DB5251683E655984308E60B4F72E6218" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_4B740FAFDB3CCBD00C8160B4F72EA3C1" xlink:to="loc_livn_SNIAMember_DB5251683E655984308E60B4F72E6218" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LitigationStatusAxis" xlink:label="loc_us-gaap_LitigationStatusAxis_E3A9C0F5ACC7C1ED338A60B4F72F40E7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:to="loc_us-gaap_LitigationStatusAxis_E3A9C0F5ACC7C1ED338A60B4F72F40E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LitigationStatusDomain" xlink:label="loc_us-gaap_LitigationStatusDomain_D7FBA9F9FDC9F8CF758F60B4F72FDB8E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationStatusAxis_E3A9C0F5ACC7C1ED338A60B4F72F40E7" xlink:to="loc_us-gaap_LitigationStatusDomain_D7FBA9F9FDC9F8CF758F60B4F72FDB8E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LitigationStatusDomain" xlink:label="loc_us-gaap_LitigationStatusDomain_D7FBA9F9FDC9F8CF758F60B4F72FDB8E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationStatusAxis_E3A9C0F5ACC7C1ED338A60B4F72F40E7" xlink:to="loc_us-gaap_LitigationStatusDomain_D7FBA9F9FDC9F8CF758F60B4F72FDB8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PendingLitigationMember" xlink:label="loc_us-gaap_PendingLitigationMember_F34B4E4BE3E7A2D39FE260B4F72F7344" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationStatusDomain_D7FBA9F9FDC9F8CF758F60B4F72FDB8E" xlink:to="loc_us-gaap_PendingLitigationMember_F34B4E4BE3E7A2D39FE260B4F72F7344" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SettledLitigationMember" xlink:label="loc_us-gaap_SettledLitigationMember_BAF002641DA481A8DA8860B4F72FB67A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationStatusDomain_D7FBA9F9FDC9F8CF758F60B4F72FDB8E" xlink:to="loc_us-gaap_SettledLitigationMember_BAF002641DA481A8DA8860B4F72FB67A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ThreatenedLitigationMember" xlink:label="loc_us-gaap_ThreatenedLitigationMember_3C28E4F2186134406AA460B4F72FF58C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationStatusDomain_D7FBA9F9FDC9F8CF758F60B4F72FDB8E" xlink:to="loc_us-gaap_ThreatenedLitigationMember_3C28E4F2186134406AA460B4F72FF58C" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_231A47A2E6D70FE5E50360B4F73056DF" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:to="loc_dei_LegalEntityAxis_231A47A2E6D70FE5E50360B4F73056DF" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_4EDBB9305ACD97436E7E60B4F730866C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_231A47A2E6D70FE5E50360B4F73056DF" xlink:to="loc_dei_EntityDomain_4EDBB9305ACD97436E7E60B4F730866C_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_4EDBB9305ACD97436E7E60B4F730866C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_231A47A2E6D70FE5E50360B4F73056DF" xlink:to="loc_dei_EntityDomain_4EDBB9305ACD97436E7E60B4F730866C" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_SorinS.p.A.Member" xlink:label="loc_livn_SorinS.p.A.Member_607EEC93C9CCCDF1D22B60B4F730E6E7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4EDBB9305ACD97436E7E60B4F730866C" xlink:to="loc_livn_SorinS.p.A.Member_607EEC93C9CCCDF1D22B60B4F730E6E7" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_SNIAs.p.aMember" xlink:label="loc_livn_SNIAs.p.aMember_60476F01DF949834DA1660B4F7308550" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4EDBB9305ACD97436E7E60B4F730866C" xlink:to="loc_livn_SNIAs.p.aMember_60476F01DF949834DA1660B4F7308550" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainContingenciesByNatureAxis" xlink:label="loc_us-gaap_GainContingenciesByNatureAxis_6E908043D4CD5AEC741C60B4F7303B55" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:to="loc_us-gaap_GainContingenciesByNatureAxis_6E908043D4CD5AEC741C60B4F7303B55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainContingencyNatureDomain" xlink:label="loc_us-gaap_GainContingencyNatureDomain_EE695FA9ED62A3CD222060B4F731F4CE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GainContingenciesByNatureAxis_6E908043D4CD5AEC741C60B4F7303B55" xlink:to="loc_us-gaap_GainContingencyNatureDomain_EE695FA9ED62A3CD222060B4F731F4CE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainContingencyNatureDomain" xlink:label="loc_us-gaap_GainContingencyNatureDomain_EE695FA9ED62A3CD222060B4F731F4CE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GainContingenciesByNatureAxis_6E908043D4CD5AEC741C60B4F7303B55" xlink:to="loc_us-gaap_GainContingencyNatureDomain_EE695FA9ED62A3CD222060B4F731F4CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PositiveOutcomeOfLitigationMember" xlink:label="loc_us-gaap_PositiveOutcomeOfLitigationMember_49B564FEB274E7793E4A60B4F731FCB9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GainContingencyNatureDomain_EE695FA9ED62A3CD222060B4F731F4CE" xlink:to="loc_us-gaap_PositiveOutcomeOfLitigationMember_49B564FEB274E7793E4A60B4F731FCB9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_6BF1695E20D4CEBAA87B60B4F7312240" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_105A0A815820CC597EE260B4F72B399C" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_6BF1695E20D4CEBAA87B60B4F7312240" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_6B3C69FF552BEBE9BB6C60B4F731D1A2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_6BF1695E20D4CEBAA87B60B4F7312240" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_6B3C69FF552BEBE9BB6C60B4F731D1A2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_6B3C69FF552BEBE9BB6C60B4F731D1A2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_6BF1695E20D4CEBAA87B60B4F7312240" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_6B3C69FF552BEBE9BB6C60B4F731D1A2" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_RegionalInternalRevenueOfficeofLombardyMember" xlink:label="loc_livn_RegionalInternalRevenueOfficeofLombardyMember_DD3D22E534AF587BF7B160B4F732F61B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_6B3C69FF552BEBE9BB6C60B4F731D1A2" xlink:to="loc_livn_RegionalInternalRevenueOfficeofLombardyMember_DD3D22E534AF587BF7B160B4F732F61B" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_LossContingencyNumberofObservedNonConformities" xlink:label="loc_livn_LossContingencyNumberofObservedNonConformities_10C16A03058C4D72AA6560B4F732DBF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_livn_LossContingencyNumberofObservedNonConformities_10C16A03058C4D72AA6560B4F732DBF5" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ProductRemediationNet" xlink:label="loc_livn_ProductRemediationNet_DBD7DFD3F6B38A77FFA760B4F732C5EC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_livn_ProductRemediationNet_DBD7DFD3F6B38A77FFA760B4F732C5EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber" xlink:label="loc_us-gaap_LossContingencyPendingClaimsNumber_B0077A2D6699FD13890860B4F732925C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_us-gaap_LossContingencyPendingClaimsNumber_B0077A2D6699FD13890860B4F732925C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_E9B2319A0AB19D25B6BE60B4F7338464" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_E9B2319A0AB19D25B6BE60B4F7338464" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForLegalSettlements" xlink:label="loc_us-gaap_PaymentsForLegalSettlements_7453137195EC25404D3860B4F733AEAB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_us-gaap_PaymentsForLegalSettlements_7453137195EC25404D3860B4F733AEAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyAccrualProvision" xlink:label="loc_us-gaap_LossContingencyAccrualProvision_52AA7A020A9F41D296A960B4F7331B73" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_us-gaap_LossContingencyAccrualProvision_52AA7A020A9F41D296A960B4F7331B73" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ProductLiabilityInsuranceCoverage" xlink:label="loc_livn_ProductLiabilityInsuranceCoverage_20D07ABF40968096EBEE60B4F7337ACF" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_livn_ProductLiabilityInsuranceCoverage_20D07ABF40968096EBEE60B4F7337ACF" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ProductLiabilityInsuranceSelfRetentionLimitThreshold" xlink:label="loc_livn_ProductLiabilityInsuranceSelfRetentionLimitThreshold_B4E569E9B278B5C2305860B4F734C1EC" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_livn_ProductLiabilityInsuranceSelfRetentionLimitThreshold_B4E569E9B278B5C2305860B4F734C1EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyDamagesSoughtValue" xlink:label="loc_us-gaap_LossContingencyDamagesSoughtValue_8C8FD76BDB2245629E6560B4F7346428" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_us-gaap_LossContingencyDamagesSoughtValue_8C8FD76BDB2245629E6560B4F7346428" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedFromOtherParty" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedFromOtherParty_87C6B0F1D292C4940C2260B4F734011F" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedFromOtherParty_87C6B0F1D292C4940C2260B4F734011F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LegalFees" xlink:label="loc_us-gaap_LegalFees_70F5518E1803FB1CDF0D60B4F7346661" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_us-gaap_LegalFees_70F5518E1803FB1CDF0D60B4F7346661" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_IncomeTaxExaminationOperatingLossesUnderDispute" xlink:label="loc_livn_IncomeTaxExaminationOperatingLossesUnderDispute_FE7CECE88F4883CDE3EE60B4F7398747" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_livn_IncomeTaxExaminationOperatingLossesUnderDispute_FE7CECE88F4883CDE3EE60B4F7398747" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_IncomeTaxExaminationNumberofInstallments" xlink:label="loc_livn_IncomeTaxExaminationNumberofInstallments_A42A70125A7174D5AC4660B4F73AA046" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_livn_IncomeTaxExaminationNumberofInstallments_A42A70125A7174D5AC4660B4F73AA046" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_LossContingencyNumberofAssessments" xlink:label="loc_livn_LossContingencyNumberofAssessments_6EB83E24781F9948720460B4F73A4432" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_livn_LossContingencyNumberofAssessments_6EB83E24781F9948720460B4F73A4432" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss" xlink:label="loc_us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss_60EDE8ABB0C262B1EF6F60B4F73A5E9B" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_67733EB16554722BCA3360B4F7326A87" xlink:to="loc_us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss_60EDE8ABB0C262B1EF6F60B4F73A5E9B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/CondensedConsolidatedStatementsOfIncomeLoss" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagement" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementAmountOfGainLossRecognizedInOciAndIncomeStatementDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_60ED52287ADE7424E87C5A527E199AE1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5C7AD45109996D0A06155A527E16A5B7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_60ED52287ADE7424E87C5A527E199AE1" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5C7AD45109996D0A06155A527E16A5B7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_705B435747537B24E85F5A527E1652DA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5C7AD45109996D0A06155A527E16A5B7" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_705B435747537B24E85F5A527E1652DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingRelationshipDomain" xlink:label="loc_us-gaap_HedgingRelationshipDomain_454EBE9749D7780812EC5A527E17F9A0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_705B435747537B24E85F5A527E1652DA" xlink:to="loc_us-gaap_HedgingRelationshipDomain_454EBE9749D7780812EC5A527E17F9A0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingRelationshipDomain" xlink:label="loc_us-gaap_HedgingRelationshipDomain_454EBE9749D7780812EC5A527E17F9A0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_705B435747537B24E85F5A527E1652DA" xlink:to="loc_us-gaap_HedgingRelationshipDomain_454EBE9749D7780812EC5A527E17F9A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashFlowHedgingMember" xlink:label="loc_us-gaap_CashFlowHedgingMember_64C517B030E0B082A3025A527E17383A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_454EBE9749D7780812EC5A527E17F9A0" xlink:to="loc_us-gaap_CashFlowHedgingMember_64C517B030E0B082A3025A527E17383A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_4480E296075529E823AE5A527E17681A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5C7AD45109996D0A06155A527E16A5B7" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_4480E296075529E823AE5A527E17681A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_F71BE777385612D436E15A527E1824B8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_4480E296075529E823AE5A527E17681A" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_F71BE777385612D436E15A527E1824B8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_F71BE777385612D436E15A527E1824B8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_4480E296075529E823AE5A527E17681A" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_F71BE777385612D436E15A527E1824B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="loc_us-gaap_ForeignExchangeContractMember_EBEFAAFA55031ADD7D885A527E187DA3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_F71BE777385612D436E15A527E1824B8" xlink:to="loc_us-gaap_ForeignExchangeContractMember_EBEFAAFA55031ADD7D885A527E187DA3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_DE8D3E06786CC66D12A55A527E182FAB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_F71BE777385612D436E15A527E1824B8" xlink:to="loc_us-gaap_InterestRateSwapMember_DE8D3E06786CC66D12A55A527E182FAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_85BD20C571D0B0E329635A527E18B60D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5C7AD45109996D0A06155A527E16A5B7" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_85BD20C571D0B0E329635A527E18B60D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_2B2A66BC309BA58206135A527E18519F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_85BD20C571D0B0E329635A527E18B60D" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_2B2A66BC309BA58206135A527E18519F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_2B2A66BC309BA58206135A527E18519F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_85BD20C571D0B0E329635A527E18B60D" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_2B2A66BC309BA58206135A527E18519F" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ForeignExchangeandOtherMember" xlink:label="loc_livn_ForeignExchangeandOtherMember_7EF9B3098A01D0DF66D85A527E19F35B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_2B2A66BC309BA58206135A527E18519F" xlink:to="loc_livn_ForeignExchangeandOtherMember_7EF9B3098A01D0DF66D85A527E19F35B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_A45C086269D5B658313A5A527E192985" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_2B2A66BC309BA58206135A527E18519F" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_A45C086269D5B658313A5A527E192985" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseMember" xlink:label="loc_us-gaap_InterestExpenseMember_5979150BFF551AE207835A527E19B37D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_2B2A66BC309BA58206135A527E18519F" xlink:to="loc_us-gaap_InterestExpenseMember_5979150BFF551AE207835A527E19B37D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_ADA2B1C7BC9D37D2C9445A527E199B89" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_60ED52287ADE7424E87C5A527E199AE1" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_ADA2B1C7BC9D37D2C9445A527E199B89" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet_1ECDE77CE844FBFC2D925A527E1A05DB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_60ED52287ADE7424E87C5A527E199AE1" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet_1ECDE77CE844FBFC2D925A527E1A05DB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementDerivativeNotionalAmountsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_3DAECFBB38B7B897EB5F463B8812FCBD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeTable" xlink:label="loc_us-gaap_DerivativeTable_E9F3284DA77A8849F929463B880DFB3A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_3DAECFBB38B7B897EB5F463B8812FCBD" xlink:to="loc_us-gaap_DerivativeTable_E9F3284DA77A8849F929463B880DFB3A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_C987A4A38BD4EEE687C3463B880EF8D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_E9F3284DA77A8849F929463B880DFB3A" xlink:to="loc_us-gaap_HedgingDesignationAxis_C987A4A38BD4EEE687C3463B880EF8D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_71CFD8FFB002C8520936463B880ED3C0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_C987A4A38BD4EEE687C3463B880EF8D4" xlink:to="loc_us-gaap_HedgingDesignationDomain_71CFD8FFB002C8520936463B880ED3C0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_71CFD8FFB002C8520936463B880ED3C0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_C987A4A38BD4EEE687C3463B880EF8D4" xlink:to="loc_us-gaap_HedgingDesignationDomain_71CFD8FFB002C8520936463B880ED3C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_AE5AF3BEED1F7ECDFA69463B880F4058" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_71CFD8FFB002C8520936463B880ED3C0" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_AE5AF3BEED1F7ECDFA69463B880F4058" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_62E79147B1777BC3FFEE463B880FA628" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_E9F3284DA77A8849F929463B880DFB3A" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_62E79147B1777BC3FFEE463B880FA628" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingRelationshipDomain" xlink:label="loc_us-gaap_HedgingRelationshipDomain_ADFFB9C8C103F36C6994463B880F1FAB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_62E79147B1777BC3FFEE463B880FA628" xlink:to="loc_us-gaap_HedgingRelationshipDomain_ADFFB9C8C103F36C6994463B880F1FAB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingRelationshipDomain" xlink:label="loc_us-gaap_HedgingRelationshipDomain_ADFFB9C8C103F36C6994463B880F1FAB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_62E79147B1777BC3FFEE463B880FA628" xlink:to="loc_us-gaap_HedgingRelationshipDomain_ADFFB9C8C103F36C6994463B880F1FAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashFlowHedgingMember" xlink:label="loc_us-gaap_CashFlowHedgingMember_1B56A26AAADF1C0B14EC463B880F55A2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_ADFFB9C8C103F36C6994463B880F1FAB" xlink:to="loc_us-gaap_CashFlowHedgingMember_1B56A26AAADF1C0B14EC463B880F55A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_A9342A7AF5755B112038463B880FB1DD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_E9F3284DA77A8849F929463B880DFB3A" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_A9342A7AF5755B112038463B880FB1DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_A99329E52A9E622A4858463B88100980_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_A9342A7AF5755B112038463B880FB1DD" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_A99329E52A9E622A4858463B88100980_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_A99329E52A9E622A4858463B88100980" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_A9342A7AF5755B112038463B880FB1DD" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_A99329E52A9E622A4858463B88100980" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="loc_us-gaap_ForeignExchangeContractMember_80A1D6B9AAEA6B1219D0463B8810172C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_A99329E52A9E622A4858463B88100980" xlink:to="loc_us-gaap_ForeignExchangeContractMember_80A1D6B9AAEA6B1219D0463B8810172C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_D3AEE070B5E115EF8BAF463B88103D30" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_A99329E52A9E622A4858463B88100980" xlink:to="loc_us-gaap_InterestRateSwapMember_D3AEE070B5E115EF8BAF463B88103D30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CurrencyAxis" xlink:label="loc_srt_CurrencyAxis_BE34DD11F748F13B2A1D463B88117937" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_E9F3284DA77A8849F929463B880DFB3A" xlink:to="loc_srt_CurrencyAxis_BE34DD11F748F13B2A1D463B88117937" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="loc_currency_AllCurrenciesDomain_279D27F4CEC8400516AB463B881195E9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_BE34DD11F748F13B2A1D463B88117937" xlink:to="loc_currency_AllCurrenciesDomain_279D27F4CEC8400516AB463B881195E9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="loc_currency_AllCurrenciesDomain_279D27F4CEC8400516AB463B881195E9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_BE34DD11F748F13B2A1D463B88117937" xlink:to="loc_currency_AllCurrenciesDomain_279D27F4CEC8400516AB463B881195E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_GBP" xlink:label="loc_currency_GBP_4638FD6652F525BB9A5B463B88118014" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_279D27F4CEC8400516AB463B881195E9" xlink:to="loc_currency_GBP_4638FD6652F525BB9A5B463B88118014" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_JPY" xlink:label="loc_currency_JPY_0A66A359381D8E6E5D5A463B8811C024" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_279D27F4CEC8400516AB463B881195E9" xlink:to="loc_currency_JPY_0A66A359381D8E6E5D5A463B8811C024" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_CAD" xlink:label="loc_currency_CAD_57EDBACBAAF112D6BAA0463B88128E64" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_279D27F4CEC8400516AB463B881195E9" xlink:to="loc_currency_CAD_57EDBACBAAF112D6BAA0463B88128E64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_EUR" xlink:label="loc_currency_EUR_F9DFB3B7F5EE14D4913A463B8812A801" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_279D27F4CEC8400516AB463B881195E9" xlink:to="loc_currency_EUR_F9DFB3B7F5EE14D4913A463B8812A801" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_8F1E343D92C00C48B742463B88125BB5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_3DAECFBB38B7B897EB5F463B8812FCBD" xlink:to="loc_invest_DerivativeNotionalAmount_8F1E343D92C00C48B742463B88125BB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_E284259BC4BEBA7CF785463B8812B67F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_3DAECFBB38B7B897EB5F463B8812FCBD" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_E284259BC4BEBA7CF785463B8812B67F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths" xlink:label="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_B07DCF68B034298F5416463B8812EE86" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_3DAECFBB38B7B897EB5F463B8812FCBD" xlink:to="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_B07DCF68B034298F5416463B8812EE86" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementFairValueOfDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_B37AC42B7E11C473AD37463B87FECAD9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3AE5011E7AD72C2805A6463B87FA8C37" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_B37AC42B7E11C473AD37463B87FECAD9" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3AE5011E7AD72C2805A6463B87FA8C37" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_94F8FF97301565E1A3C0463B87FA974F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3AE5011E7AD72C2805A6463B87FA8C37" xlink:to="loc_us-gaap_HedgingDesignationAxis_94F8FF97301565E1A3C0463B87FA974F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_9BEBBBD4F8CB46607267463B87FAD168_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_94F8FF97301565E1A3C0463B87FA974F" xlink:to="loc_us-gaap_HedgingDesignationDomain_9BEBBBD4F8CB46607267463B87FAD168_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_9BEBBBD4F8CB46607267463B87FAD168" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_94F8FF97301565E1A3C0463B87FA974F" xlink:to="loc_us-gaap_HedgingDesignationDomain_9BEBBBD4F8CB46607267463B87FAD168" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_280199D9CB8AC635B4DA463B87FB853E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_9BEBBBD4F8CB46607267463B87FAD168" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_280199D9CB8AC635B4DA463B87FB853E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_41F43FA7A1E343734BC9463B87FB2381" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_9BEBBBD4F8CB46607267463B87FAD168" xlink:to="loc_us-gaap_NondesignatedMember_41F43FA7A1E343734BC9463B87FB2381" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_D936205A2451FA770589463B87FB98CF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3AE5011E7AD72C2805A6463B87FA8C37" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_D936205A2451FA770589463B87FB98CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_73D04002599010E1154D463B87FBEB3F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_D936205A2451FA770589463B87FB98CF" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_73D04002599010E1154D463B87FBEB3F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_73D04002599010E1154D463B87FBEB3F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_D936205A2451FA770589463B87FB98CF" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_73D04002599010E1154D463B87FBEB3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_4326AE257B83708FE13E463B87FCC3A5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_73D04002599010E1154D463B87FBEB3F" xlink:to="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_4326AE257B83708FE13E463B87FCC3A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesMember" xlink:label="loc_us-gaap_AccruedLiabilitiesMember_0BF537B0076FC3BF1363463B87FC8FB8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_73D04002599010E1154D463B87FBEB3F" xlink:to="loc_us-gaap_AccruedLiabilitiesMember_0BF537B0076FC3BF1363463B87FC8FB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsMember" xlink:label="loc_us-gaap_OtherAssetsMember_32FBF6BEF94577DCEFED463B87FC5F85" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_73D04002599010E1154D463B87FBEB3F" xlink:to="loc_us-gaap_OtherAssetsMember_32FBF6BEF94577DCEFED463B87FC5F85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_A1B8CE585ACB4090106C463B87FC7BD7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_73D04002599010E1154D463B87FBEB3F" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_A1B8CE585ACB4090106C463B87FC7BD7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_D54B13FFC96546241C10463B87FD4B00" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3AE5011E7AD72C2805A6463B87FA8C37" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_D54B13FFC96546241C10463B87FD4B00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_37E5B58611FAF0D0034B463B87FD2156_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_D54B13FFC96546241C10463B87FD4B00" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_37E5B58611FAF0D0034B463B87FD2156_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_37E5B58611FAF0D0034B463B87FD2156" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_D54B13FFC96546241C10463B87FD4B00" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_37E5B58611FAF0D0034B463B87FD2156" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateContractMember" xlink:label="loc_us-gaap_InterestRateContractMember_E5922EFCEF4ECA6FF4CF463B87FD5D02" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_37E5B58611FAF0D0034B463B87FD2156" xlink:to="loc_us-gaap_InterestRateContractMember_E5922EFCEF4ECA6FF4CF463B87FD5D02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="loc_us-gaap_ForeignExchangeContractMember_A2EEC556F0983EA85267463B87FEFC7B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_37E5B58611FAF0D0034B463B87FD2156" xlink:to="loc_us-gaap_ForeignExchangeContractMember_A2EEC556F0983EA85267463B87FEFC7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_4F3F552F4C29D518F3EB463B87FE868D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_B37AC42B7E11C473AD37463B87FECAD9" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_4F3F552F4C29D518F3EB463B87FE868D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_045F93516AE2E29C8618463B87FE40F3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_B37AC42B7E11C473AD37463B87FECAD9" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_045F93516AE2E29C8618463B87FE40F3" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_997DB6DCFD086B35838656655C651EC1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeTable" xlink:label="loc_us-gaap_DerivativeTable_3EAC6F0C974B9C219F2E56655C626017" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_997DB6DCFD086B35838656655C651EC1" xlink:to="loc_us-gaap_DerivativeTable_3EAC6F0C974B9C219F2E56655C626017" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_F525AF2DEB709D15793556655C62D612" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_3EAC6F0C974B9C219F2E56655C626017" xlink:to="loc_us-gaap_HedgingDesignationAxis_F525AF2DEB709D15793556655C62D612" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_FF34C301580CB811814956655C62C10D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_F525AF2DEB709D15793556655C62D612" xlink:to="loc_us-gaap_HedgingDesignationDomain_FF34C301580CB811814956655C62C10D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_FF34C301580CB811814956655C62C10D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_F525AF2DEB709D15793556655C62D612" xlink:to="loc_us-gaap_HedgingDesignationDomain_FF34C301580CB811814956655C62C10D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_5632F0FF6A5EE234CDA856655C63F6A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_FF34C301580CB811814956655C62C10D" xlink:to="loc_us-gaap_NondesignatedMember_5632F0FF6A5EE234CDA856655C63F6A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_F5CDE301063DD666D44C56655C63B66E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_3EAC6F0C974B9C219F2E56655C626017" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_F5CDE301063DD666D44C56655C63B66E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_33EA2032E112A7128FEA56655C6397C1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_F5CDE301063DD666D44C56655C63B66E" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_33EA2032E112A7128FEA56655C6397C1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_33EA2032E112A7128FEA56655C6397C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_F5CDE301063DD666D44C56655C63B66E" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_33EA2032E112A7128FEA56655C6397C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_BF60763FD48C94098DD756655C647DC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_33EA2032E112A7128FEA56655C6397C1" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_BF60763FD48C94098DD756655C647DC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="loc_us-gaap_ForeignExchangeContractMember_FB6C1C877A8B3801FFB756655C649FF4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_33EA2032E112A7128FEA56655C6397C1" xlink:to="loc_us-gaap_ForeignExchangeContractMember_FB6C1C877A8B3801FFB756655C649FF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_330F94325146F4C2D06856655C644B2F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_3EAC6F0C974B9C219F2E56655C626017" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_330F94325146F4C2D06856655C644B2F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_B1EFB083BE10D9E253C456655C6449B0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_330F94325146F4C2D06856655C644B2F" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_B1EFB083BE10D9E253C456655C6449B0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_B1EFB083BE10D9E253C456655C6449B0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_330F94325146F4C2D06856655C644B2F" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_B1EFB083BE10D9E253C456655C6449B0" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ForeignExchangeandOtherMember" xlink:label="loc_livn_ForeignExchangeandOtherMember_83D57711F4B2FEE37CE556655C65F49D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_B1EFB083BE10D9E253C456655C6449B0" xlink:to="loc_livn_ForeignExchangeandOtherMember_83D57711F4B2FEE37CE556655C65F49D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_B4A842E897E019E712EC56655C65CFDB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_997DB6DCFD086B35838656655C651EC1" xlink:to="loc_invest_DerivativeNotionalAmount_B4A842E897E019E712EC56655C65CFDB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_E9073213797AEA6131DC56655C655FAC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_997DB6DCFD086B35838656655C651EC1" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_E9073213797AEA6131DC56655C655FAC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DerivativesAndRiskManagementTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DiscontinuedOperations" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DiscontinuedOperationsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E98ABA286DFD2AE6DA51463B88CA242A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B3D0FF6882F0A011E6A8463B88C8916C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E98ABA286DFD2AE6DA51463B88CA242A" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B3D0FF6882F0A011E6A8463B88C8916C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_6DE5B48E69E2E98B1221463B88C8D951" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B3D0FF6882F0A011E6A8463B88C8916C" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_6DE5B48E69E2E98B1221463B88C8D951" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3E71E0B4F9B657A9BF29463B88C95BBB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_6DE5B48E69E2E98B1221463B88C8D951" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3E71E0B4F9B657A9BF29463B88C95BBB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3E71E0B4F9B657A9BF29463B88C95BBB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_6DE5B48E69E2E98B1221463B88C8D951" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3E71E0B4F9B657A9BF29463B88C95BBB" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CRMBusinessFranchiseMember" xlink:label="loc_livn_CRMBusinessFranchiseMember_FC17F4A3919221E34685463B88C9A4FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3E71E0B4F9B657A9BF29463B88C95BBB" xlink:to="loc_livn_CRMBusinessFranchiseMember_FC17F4A3919221E34685463B88C9A4FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOperatingActivitiesSegmentAxis" xlink:label="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_59E956560B289CADB609463B88C996CA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B3D0FF6882F0A011E6A8463B88C8916C" xlink:to="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_59E956560B289CADB609463B88C996CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_705F306CA04677B04643463B88C91B9D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_59E956560B289CADB609463B88C996CA" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_705F306CA04677B04643463B88C91B9D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_705F306CA04677B04643463B88C91B9D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_59E956560B289CADB609463B88C996CA" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_705F306CA04677B04643463B88C91B9D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="loc_us-gaap_SegmentDiscontinuedOperationsMember_6600DDBE77FE558E19FE463B88CA6457" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentOperatingActivitiesDomain_705F306CA04677B04643463B88C91B9D" xlink:to="loc_us-gaap_SegmentDiscontinuedOperationsMember_6600DDBE77FE558E19FE463B88CA6457" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_771E252E67AAB6EC3A21463B88CAB5D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E98ABA286DFD2AE6DA51463B88CA242A" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_771E252E67AAB6EC3A21463B88CAB5D3" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationConsiderationTransferredCashTransfered" xlink:label="loc_livn_BusinessCombinationConsiderationTransferredCashTransfered_ADDBD5B4A12FAD77AC4B463B88CB9B92" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E98ABA286DFD2AE6DA51463B88CA242A" xlink:to="loc_livn_BusinessCombinationConsiderationTransferredCashTransfered_ADDBD5B4A12FAD77AC4B463B88CB9B92" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BusinessCombinationTransitionServicesRevenue" xlink:label="loc_livn_BusinessCombinationTransitionServicesRevenue_758630BBF93C65397B94463B88CB3495" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E98ABA286DFD2AE6DA51463B88CA242A" xlink:to="loc_livn_BusinessCombinationTransitionServicesRevenue_758630BBF93C65397B94463B88CB3495" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAdditions" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAdditions_9ACCFD5094D3E4E37DB8463B88CBA8AD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E98ABA286DFD2AE6DA51463B88CA242A" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAdditions_9ACCFD5094D3E4E37DB8463B88CBA8AD" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_StockBasedCompensationDiscontinuedOperations" xlink:label="loc_livn_StockBasedCompensationDiscontinuedOperations_B71390B76EA21635425A463B88CB563D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E98ABA286DFD2AE6DA51463B88CA242A" xlink:to="loc_livn_StockBasedCompensationDiscontinuedOperations_B71390B76EA21635425A463B88CB563D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DiscontinuedOperationsOperatingGainsAndLossesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_55BAB64B4096C325365D56655D940E7D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0EE3860922B7F0BDE52F56655D926B94" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_55BAB64B4096C325365D56655D940E7D" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0EE3860922B7F0BDE52F56655D926B94" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BC1F8BF7CE7900461ABC56655D92C7CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0EE3860922B7F0BDE52F56655D926B94" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BC1F8BF7CE7900461ABC56655D92C7CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3DECF9D69F87A927199756655D937A79_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BC1F8BF7CE7900461ABC56655D92C7CC" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3DECF9D69F87A927199756655D937A79_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3DECF9D69F87A927199756655D937A79" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BC1F8BF7CE7900461ABC56655D92C7CC" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3DECF9D69F87A927199756655D937A79" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CRMBusinessFranchiseMember" xlink:label="loc_livn_CRMBusinessFranchiseMember_50706CFB0A102A1E017D56655D937ACE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3DECF9D69F87A927199756655D937A79" xlink:to="loc_livn_CRMBusinessFranchiseMember_50706CFB0A102A1E017D56655D937ACE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_0A8ED8066845B458DCB056655D93F097" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0EE3860922B7F0BDE52F56655D926B94" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_0A8ED8066845B458DCB056655D93F097" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_981ED87627EC237F36E356655D933698_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_0A8ED8066845B458DCB056655D93F097" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_981ED87627EC237F36E356655D933698_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_981ED87627EC237F36E356655D933698" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_0A8ED8066845B458DCB056655D93F097" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_981ED87627EC237F36E356655D933698" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsHeldforsaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsHeldforsaleMember_611C901FA5E30CFF5D7856655D94D06C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_981ED87627EC237F36E356655D933698" xlink:to="loc_us-gaap_DiscontinuedOperationsHeldforsaleMember_611C901FA5E30CFF5D7856655D94D06C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_5C3925BA9235B1EFF4B256655D95EFB4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_55BAB64B4096C325365D56655D940E7D" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_5C3925BA9235B1EFF4B256655D95EFB4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_C1B3F7AF6CC33387B99F56655D95D65E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_55BAB64B4096C325365D56655D940E7D" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_C1B3F7AF6CC33387B99F56655D95D65E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_BDE8C6D4546188CF7C2256655D951558" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C1B3F7AF6CC33387B99F56655D95D65E" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_BDE8C6D4546188CF7C2256655D951558" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_E579793AD57FAE70C3D856655D95A547" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C1B3F7AF6CC33387B99F56655D95D65E" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_E579793AD57FAE70C3D856655D95A547" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_DisposalGroupIncludingDiscontinuedOperationResearchandDevelopmentExpense" xlink:label="loc_livn_DisposalGroupIncludingDiscontinuedOperationResearchandDevelopmentExpense_A618C91F4DF86B7D387756655D956109" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C1B3F7AF6CC33387B99F56655D95D65E" xlink:to="loc_livn_DisposalGroupIncludingDiscontinuedOperationResearchandDevelopmentExpense_A618C91F4DF86B7D387756655D956109" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_DisposalGroupIncludingDiscontinuedOperationRestructuringExpenses" xlink:label="loc_livn_DisposalGroupIncludingDiscontinuedOperationRestructuringExpenses_BEBD4DFBE69F11B8DA0556655D965B49" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C1B3F7AF6CC33387B99F56655D95D65E" xlink:to="loc_livn_DisposalGroupIncludingDiscontinuedOperationRestructuringExpenses_BEBD4DFBE69F11B8DA0556655D965B49" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_DisposalGroupIncludingDiscontinuedOperationRevaluationOfAssetsandLiabilitiesHeldForSale" xlink:label="loc_livn_DisposalGroupIncludingDiscontinuedOperationRevaluationOfAssetsandLiabilitiesHeldForSale_D566E925433E9AAAF9FD56655D96E938" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C1B3F7AF6CC33387B99F56655D95D65E" xlink:to="loc_livn_DisposalGroupIncludingDiscontinuedOperationRevaluationOfAssetsandLiabilitiesHeldForSale_D566E925433E9AAAF9FD56655D96E938" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss_F2DE2D538C442BCB7D7E56655D9640A0" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C1B3F7AF6CC33387B99F56655D95D65E" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss_F2DE2D538C442BCB7D7E56655D9640A0" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_DisposalGroupIncludingDiscontinuedOperationForeignExchangeAndOtherGainsLosses" xlink:label="loc_livn_DisposalGroupIncludingDiscontinuedOperationForeignExchangeAndOtherGainsLosses_FD8819ABD2DD7547E0EC56655D967DBF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_55BAB64B4096C325365D56655D940E7D" xlink:to="loc_livn_DisposalGroupIncludingDiscontinuedOperationForeignExchangeAndOtherGainsLosses_FD8819ABD2DD7547E0EC56655D967DBF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax_53B90ACC94D6EB4DC3E556655D96B422" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_55BAB64B4096C325365D56655D940E7D" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax_53B90ACC94D6EB4DC3E556655D96B422" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod_4F50BCF16B57B3C9AABB56655D9661E8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_55BAB64B4096C325365D56655D940E7D" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod_4F50BCF16B57B3C9AABB56655D9661E8" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_DiscontinuedOperationIncomeLossfromEquityMethodInvestments" xlink:label="loc_livn_DiscontinuedOperationIncomeLossfromEquityMethodInvestments_4D1B278BB6FBBDD4961A56655D97FDA4" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_55BAB64B4096C325365D56655D940E7D" xlink:to="loc_livn_DiscontinuedOperationIncomeLossfromEquityMethodInvestments_4D1B278BB6FBBDD4961A56655D97FDA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_79E1EA589384533A34E156655D9740F9" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_55BAB64B4096C325365D56655D940E7D" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_79E1EA589384533A34E156655D9740F9" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DiscontinuedOperationsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/FairValueMeasurements" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/FairValueMeasurementsAssetsAndLiabilitiesThatAreMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A421AFE458629F7E5821463B8869CDBB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E5C3CF676B423039E382463B886564AB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A421AFE458629F7E5821463B8869CDBB" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E5C3CF676B423039E382463B886564AB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2562D230951D51313967463B88653A24" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E5C3CF676B423039E382463B886564AB" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2562D230951D51313967463B88653A24" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_1C715F7BE7AC06FDAE4F463B8865308E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2562D230951D51313967463B88653A24" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_1C715F7BE7AC06FDAE4F463B8865308E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_1C715F7BE7AC06FDAE4F463B8865308E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2562D230951D51313967463B88653A24" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_1C715F7BE7AC06FDAE4F463B8865308E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_3A25CCAA653D84C03DA2463B88665CB8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_1C715F7BE7AC06FDAE4F463B8865308E" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_3A25CCAA653D84C03DA2463B88665CB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0AED80FDE55D81125897463B88660A94" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E5C3CF676B423039E382463B886564AB" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0AED80FDE55D81125897463B88660A94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ED20A72DEFD58A84C903463B8866C618_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0AED80FDE55D81125897463B88660A94" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ED20A72DEFD58A84C903463B8866C618_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ED20A72DEFD58A84C903463B8866C618" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0AED80FDE55D81125897463B88660A94" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ED20A72DEFD58A84C903463B8866C618" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_ED0EBD900BE1559D73E4463B88668532" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ED20A72DEFD58A84C903463B8866C618" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_ED0EBD900BE1559D73E4463B88668532" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_46E4CFDFF4D06E2FF53C463B886766EB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ED20A72DEFD58A84C903463B8866C618" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_46E4CFDFF4D06E2FF53C463B886766EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_C76058F85FE1021A02EA463B8867F7E3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ED20A72DEFD58A84C903463B8866C618" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_C76058F85FE1021A02EA463B8867F7E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_B2FADE9664D9948C8530463B886767D6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E5C3CF676B423039E382463B886564AB" xlink:to="loc_us-gaap_HedgingDesignationAxis_B2FADE9664D9948C8530463B886767D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_29C70510DC2338A4426E463B886738DA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_B2FADE9664D9948C8530463B886767D6" xlink:to="loc_us-gaap_HedgingDesignationDomain_29C70510DC2338A4426E463B886738DA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_29C70510DC2338A4426E463B886738DA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_B2FADE9664D9948C8530463B886767D6" xlink:to="loc_us-gaap_HedgingDesignationDomain_29C70510DC2338A4426E463B886738DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_39B28A91C7B2C43D3538463B8868CB37" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_29C70510DC2338A4426E463B886738DA" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_39B28A91C7B2C43D3538463B8868CB37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_083E2722622342040610463B8868C61D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_29C70510DC2338A4426E463B886738DA" xlink:to="loc_us-gaap_NondesignatedMember_083E2722622342040610463B8868C61D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_8302343DA9A42D5B261A463B8868B7E7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E5C3CF676B423039E382463B886564AB" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_8302343DA9A42D5B261A463B8868B7E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_148A50E9E34D3BDAC038463B8868FCF3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_8302343DA9A42D5B261A463B8868B7E7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_148A50E9E34D3BDAC038463B8868FCF3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_148A50E9E34D3BDAC038463B8868FCF3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_8302343DA9A42D5B261A463B8868B7E7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_148A50E9E34D3BDAC038463B8868FCF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="loc_us-gaap_ForeignExchangeContractMember_174BF7716942BFA5888B463B8868DE50" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_148A50E9E34D3BDAC038463B8868FCF3" xlink:to="loc_us-gaap_ForeignExchangeContractMember_174BF7716942BFA5888B463B8868DE50" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateContractMember" xlink:label="loc_us-gaap_InterestRateContractMember_2B87AA9D172FF9FBDB47463B88690145" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_148A50E9E34D3BDAC038463B8868FCF3" xlink:to="loc_us-gaap_InterestRateContractMember_2B87AA9D172FF9FBDB47463B88690145" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_4D9D274F7A3CB90349BE463B8869F642" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A421AFE458629F7E5821463B8869CDBB" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_4D9D274F7A3CB90349BE463B8869F642" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeAssets" xlink:label="loc_us-gaap_DerivativeAssets_B07D13B86A7975353887463B8869BED4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_4D9D274F7A3CB90349BE463B8869F642" xlink:to="loc_us-gaap_DerivativeAssets_B07D13B86A7975353887463B8869BED4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_7D6FD41258228857802E463B88699DB0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_4D9D274F7A3CB90349BE463B8869F642" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_7D6FD41258228857802E463B88699DB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract" xlink:label="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_CDDF3298CBF809565DD8463B886A1CD8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A421AFE458629F7E5821463B8869CDBB" xlink:to="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_CDDF3298CBF809565DD8463B886A1CD8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilities" xlink:label="loc_us-gaap_DerivativeLiabilities_063403B8369574788525463B886A548B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_CDDF3298CBF809565DD8463B886A1CD8" xlink:to="loc_us-gaap_DerivativeLiabilities_063403B8369574788525463B886A548B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_6577E68CC04FE728FE63463B886A1F96" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_CDDF3298CBF809565DD8463B886A1CD8" xlink:to="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_6577E68CC04FE728FE63463B886A1F96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_513F14B368319642AC07463B886A8765" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_CDDF3298CBF809565DD8463B886A1CD8" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_513F14B368319642AC07463B886A8765" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/FairValueMeasurementsContingentConsiderationReconciliationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_05DE155860D626FB001146614775061B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_81C83587846077101CED466147740BEB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_05DE155860D626FB001146614775061B" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_81C83587846077101CED466147740BEB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C73E74228A316A5FF71946614774307C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_81C83587846077101CED466147740BEB" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C73E74228A316A5FF71946614774307C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_A212BDAB17B0C3C1C8F14661477560F9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C73E74228A316A5FF71946614774307C" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_A212BDAB17B0C3C1C8F14661477560F9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_A212BDAB17B0C3C1C8F14661477560F9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C73E74228A316A5FF71946614774307C" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_A212BDAB17B0C3C1C8F14661477560F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_29569E2DBBE19E640ED146614775C711" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_A212BDAB17B0C3C1C8F14661477560F9" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_29569E2DBBE19E640ED146614775C711" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_757C61544AFD2A40402746614776C85E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_05DE155860D626FB001146614775061B" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_757C61544AFD2A40402746614776C85E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_38D9A65CBDBF345489EB46614776253A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_757C61544AFD2A40402746614776C85E" xlink:to="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_38D9A65CBDBF345489EB46614776253A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_E68ED887869556E4640B466147768F4B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_757C61544AFD2A40402746614776C85E" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_E68ED887869556E4640B466147768F4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_FA95AE32CFCCE88CA53146614776B22B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_757C61544AFD2A40402746614776C85E" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_FA95AE32CFCCE88CA53146614776B22B" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisCurrentLiabilityValue" xlink:label="loc_livn_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisCurrentLiabilityValue_1DD8C1EF3A3E5D096A544661477765E7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_757C61544AFD2A40402746614776C85E" xlink:to="loc_livn_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisCurrentLiabilityValue_1DD8C1EF3A3E5D096A544661477765E7" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisNoncurrentLiabilityValue" xlink:label="loc_livn_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisNoncurrentLiabilityValue_7F7BA428C4784B878BD546614777AB4A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_757C61544AFD2A40402746614776C85E" xlink:to="loc_livn_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisNoncurrentLiabilityValue_7F7BA428C4784B878BD546614777AB4A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/FairValueMeasurementsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/FinancingArrangements" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/FinancingArrangementsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_7090F190C600BA4921025BBDD798DD8E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_6FA3E4844C509226C4995BBDD7932C81" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7090F190C600BA4921025BBDD798DD8E" xlink:to="loc_us-gaap_DebtInstrumentTable_6FA3E4844C509226C4995BBDD7932C81" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_1470F8B645FE0D11F4E85BBDD7930127" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6FA3E4844C509226C4995BBDD7932C81" xlink:to="loc_us-gaap_DebtInstrumentAxis_1470F8B645FE0D11F4E85BBDD7930127" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_251331C6529DA26D9DF75BBDD7944265_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_1470F8B645FE0D11F4E85BBDD7930127" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_251331C6529DA26D9DF75BBDD7944265_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_251331C6529DA26D9DF75BBDD7944265" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_1470F8B645FE0D11F4E85BBDD7930127" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_251331C6529DA26D9DF75BBDD7944265" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_USDenominatedBorrowingsMember" xlink:label="loc_livn_USDenominatedBorrowingsMember_400204E9B944CA7CAA585BBDD794778D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_251331C6529DA26D9DF75BBDD7944265" xlink:to="loc_livn_USDenominatedBorrowingsMember_400204E9B944CA7CAA585BBDD794778D" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_EuroDenominatedBorrowingsMember" xlink:label="loc_livn_EuroDenominatedBorrowingsMember_CDE834AEDF1E37FEA4AB5BBDD79482A8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_251331C6529DA26D9DF75BBDD7944265" xlink:to="loc_livn_EuroDenominatedBorrowingsMember_CDE834AEDF1E37FEA4AB5BBDD79482A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_1D4C980B1F27F35A6D6B5BBDD7948501" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6FA3E4844C509226C4995BBDD7932C81" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_1D4C980B1F27F35A6D6B5BBDD7948501" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_36764C5BA7C298DEC6A15BBDD7943791_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1D4C980B1F27F35A6D6B5BBDD7948501" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_36764C5BA7C298DEC6A15BBDD7943791_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_36764C5BA7C298DEC6A15BBDD7943791" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1D4C980B1F27F35A6D6B5BBDD7948501" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_36764C5BA7C298DEC6A15BBDD7943791" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BarclaysBankMember" xlink:label="loc_livn_BarclaysBankMember_6455DCADCEF8244CC8CE5BBDD7959707" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_36764C5BA7C298DEC6A15BBDD7943791" xlink:to="loc_livn_BarclaysBankMember_6455DCADCEF8244CC8CE5BBDD7959707" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_C044D82E9142981604E75BBDD795DEE0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6FA3E4844C509226C4995BBDD7932C81" xlink:to="loc_us-gaap_VariableRateAxis_C044D82E9142981604E75BBDD795DEE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_2C330FE5A2256A1DF5E05BBDD79530D0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_C044D82E9142981604E75BBDD795DEE0" xlink:to="loc_us-gaap_VariableRateDomain_2C330FE5A2256A1DF5E05BBDD79530D0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_2C330FE5A2256A1DF5E05BBDD79530D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_C044D82E9142981604E75BBDD795DEE0" xlink:to="loc_us-gaap_VariableRateDomain_2C330FE5A2256A1DF5E05BBDD79530D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_82B0CF993468AD71FEC05BBDD7957471" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_2C330FE5A2256A1DF5E05BBDD79530D0" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_82B0CF993468AD71FEC05BBDD7957471" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_86787D4BA8B6D4FA61415BBDD796F48A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6FA3E4844C509226C4995BBDD7932C81" xlink:to="loc_srt_RangeAxis_86787D4BA8B6D4FA61415BBDD796F48A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_5C8BED168126F63DBADF5BBDD7966249_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_86787D4BA8B6D4FA61415BBDD796F48A" xlink:to="loc_srt_RangeMember_5C8BED168126F63DBADF5BBDD7966249_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_5C8BED168126F63DBADF5BBDD7966249" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_86787D4BA8B6D4FA61415BBDD796F48A" xlink:to="loc_srt_RangeMember_5C8BED168126F63DBADF5BBDD7966249" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_0B76E4A44076C0C2B8C95BBDD7960E7C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5C8BED168126F63DBADF5BBDD7966249" xlink:to="loc_srt_MinimumMember_0B76E4A44076C0C2B8C95BBDD7960E7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_262ADD72A43EAD5292B95BBDD796AC18" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5C8BED168126F63DBADF5BBDD7966249" xlink:to="loc_srt_MaximumMember_262ADD72A43EAD5292B95BBDD796AC18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_EC117CBCDCC78E3802BA5BBDD797DCEB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6FA3E4844C509226C4995BBDD7932C81" xlink:to="loc_us-gaap_CreditFacilityAxis_EC117CBCDCC78E3802BA5BBDD797DCEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_52F440510CEC72FC41555BBDD7970F7B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_EC117CBCDCC78E3802BA5BBDD797DCEB" xlink:to="loc_us-gaap_CreditFacilityDomain_52F440510CEC72FC41555BBDD7970F7B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_52F440510CEC72FC41555BBDD7970F7B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_EC117CBCDCC78E3802BA5BBDD797DCEB" xlink:to="loc_us-gaap_CreditFacilityDomain_52F440510CEC72FC41555BBDD7970F7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_4654296769CA52E7022E5BBFBC956027" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_52F440510CEC72FC41555BBDD7970F7B" xlink:to="loc_us-gaap_LineOfCreditMember_4654296769CA52E7022E5BBFBC956027" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_FacilityAgreement2019Member" xlink:label="loc_livn_FacilityAgreement2019Member_28A3E2DB8984DBDBA96C5BBDD79745F3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_52F440510CEC72FC41555BBDD7970F7B" xlink:to="loc_livn_FacilityAgreement2019Member_28A3E2DB8984DBDBA96C5BBDD79745F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_CBA4E148AA1DC86F85BF5BBDD797C0F7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_52F440510CEC72FC41555BBDD7970F7B" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_CBA4E148AA1DC86F85BF5BBDD797C0F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_6CC3D54273FDA7BCB65F5BBDD7986D2C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7090F190C600BA4921025BBDD798DD8E" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_6CC3D54273FDA7BCB65F5BBDD7986D2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_526CFEE178DDDCDC28CF5BBDD7986ABD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7090F190C600BA4921025BBDD798DD8E" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_526CFEE178DDDCDC28CF5BBDD7986ABD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_7B4517B974A78244AE425BBDD7985B61" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7090F190C600BA4921025BBDD798DD8E" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_7B4517B974A78244AE425BBDD7985B61" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="loc_us-gaap_RepaymentsOfDebt_908E3815E1C12D2CB8855BBDD79824DE" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7090F190C600BA4921025BBDD798DD8E" xlink:to="loc_us-gaap_RepaymentsOfDebt_908E3815E1C12D2CB8855BBDD79824DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_5FC567339812F5C237AE5BBDD7997765" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7090F190C600BA4921025BBDD798DD8E" xlink:to="loc_us-gaap_ShortTermBorrowings_5FC567339812F5C237AE5BBDD7997765" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_E40404733A45AB30014C5BBDD7994835" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7090F190C600BA4921025BBDD798DD8E" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_E40404733A45AB30014C5BBDD7994835" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:label="loc_us-gaap_DebtInstrumentTerm_9BD87F1E4124962662B35BBDD79986EE" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7090F190C600BA4921025BBDD798DD8E" xlink:to="loc_us-gaap_DebtInstrumentTerm_9BD87F1E4124962662B35BBDD79986EE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/FinancingArrangementsLongTermDebtOutstandingRevolvingCreditAndEuropeanInvestmentBankFinancingAgreementDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_7286804640F43B5EC9A6463B8857FECB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_34DC2CAB57C1A018CDFC463B8854605D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7286804640F43B5EC9A6463B8857FECB" xlink:to="loc_us-gaap_DebtInstrumentTable_34DC2CAB57C1A018CDFC463B8854605D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_F85A2D8DB62046D57620463B88549033" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_34DC2CAB57C1A018CDFC463B8854605D" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_F85A2D8DB62046D57620463B88549033" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_38FFDB49F7E62D98AA5C463B885407BC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_F85A2D8DB62046D57620463B88549033" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_38FFDB49F7E62D98AA5C463B885407BC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_38FFDB49F7E62D98AA5C463B885407BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_F85A2D8DB62046D57620463B88549033" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_38FFDB49F7E62D98AA5C463B885407BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansPayableMember" xlink:label="loc_us-gaap_LoansPayableMember_2562BC655D1D59EBE7E0463B88540266" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_38FFDB49F7E62D98AA5C463B885407BC" xlink:to="loc_us-gaap_LoansPayableMember_2562BC655D1D59EBE7E0463B88540266" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MortgagesMember" xlink:label="loc_us-gaap_MortgagesMember_99494F6CAFE33DB636A7463B8855AADF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_38FFDB49F7E62D98AA5C463B885407BC" xlink:to="loc_us-gaap_MortgagesMember_99494F6CAFE33DB636A7463B8855AADF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_CA018A9D5DFEADF080B3463B88553D4F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_34DC2CAB57C1A018CDFC463B8854605D" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_CA018A9D5DFEADF080B3463B88553D4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_CA018A9D5DFEADF080B3463B88553D4F" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_CA018A9D5DFEADF080B3463B88553D4F" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_EuropeanInvestmentBank2017Member" xlink:label="loc_livn_EuropeanInvestmentBank2017Member_36449A044A01BA04D152463B8855F433" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F" xlink:to="loc_livn_EuropeanInvestmentBank2017Member_36449A044A01BA04D152463B8855F433" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_EuropeanInvestmentBank2014Member" xlink:label="loc_livn_EuropeanInvestmentBank2014Member_1554CED7D6D44A2A21B6463B8856B5D7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F" xlink:to="loc_livn_EuropeanInvestmentBank2014Member_1554CED7D6D44A2A21B6463B8856B5D7" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_MediocreditoItalianoMember" xlink:label="loc_livn_MediocreditoItalianoMember_40D8D89B86330DF70E19463B885685D3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F" xlink:to="loc_livn_MediocreditoItalianoMember_40D8D89B86330DF70E19463B885685D3" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BankofAmericaU.SMember" xlink:label="loc_livn_BankofAmericaU.SMember_3084212DA73B61010708463B88565C13" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F" xlink:to="loc_livn_BankofAmericaU.SMember_3084212DA73B61010708463B88565C13" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_BancadelMezzogiornoMember" xlink:label="loc_livn_BancadelMezzogiornoMember_06F063CDD60887749108463B88562848" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F" xlink:to="loc_livn_BancadelMezzogiornoMember_06F063CDD60887749108463B88562848" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_RegionWallonneMember" xlink:label="loc_livn_RegionWallonneMember_3752E6919A96D40FE1D5463B8856DE21" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_A93767974FC914CC7551463B8855C84F" xlink:to="loc_livn_RegionWallonneMember_3752E6919A96D40FE1D5463B8856DE21" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_5BEAFAB19CD3C40DA5C5463B8856EA75" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_34DC2CAB57C1A018CDFC463B8854605D" xlink:to="loc_srt_RangeAxis_5BEAFAB19CD3C40DA5C5463B8856EA75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_C80481792B86B3614C1E463B8857F6A9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_5BEAFAB19CD3C40DA5C5463B8856EA75" xlink:to="loc_srt_RangeMember_C80481792B86B3614C1E463B8857F6A9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_C80481792B86B3614C1E463B8857F6A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_5BEAFAB19CD3C40DA5C5463B8856EA75" xlink:to="loc_srt_RangeMember_C80481792B86B3614C1E463B8857F6A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_78B4A37B4ADEDFF376CF463B88571488" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_C80481792B86B3614C1E463B8857F6A9" xlink:to="loc_srt_MinimumMember_78B4A37B4ADEDFF376CF463B88571488" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_A3A93E9B2046BB6D4B7B463B88577166" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_C80481792B86B3614C1E463B8857F6A9" xlink:to="loc_srt_MaximumMember_A3A93E9B2046BB6D4B7B463B88577166" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_707A789EDE8ACAC720DB463B8858156C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7286804640F43B5EC9A6463B8857FECB" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_707A789EDE8ACAC720DB463B8858156C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_E1DA4A419F4315BC87D3463B8858F00E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7286804640F43B5EC9A6463B8857FECB" xlink:to="loc_us-gaap_LongTermDebtCurrent_E1DA4A419F4315BC87D3463B8858F00E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_5385EC52165F33CBA38B463B88589DC1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7286804640F43B5EC9A6463B8857FECB" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_5385EC52165F33CBA38B463B88589DC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_38934E9B0125A08F35F9463B8858A391" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7286804640F43B5EC9A6463B8857FECB" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_38934E9B0125A08F35F9463B8858A391" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/FinancingArrangementsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformationChangesInCarryingAmountOfGoodwillDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_E7691219FAC7667573E37391D657A730" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2BEF72C78D9D85E6CBD07391D655E2AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E7691219FAC7667573E37391D657A730" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2BEF72C78D9D85E6CBD07391D655E2AD" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_E65FE513D615AF4C679A7391D656140A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2BEF72C78D9D85E6CBD07391D655E2AD" xlink:to="loc_srt_ConsolidationItemsAxis_E65FE513D615AF4C679A7391D656140A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_DD6928419CD24133D68B7391D6565C33_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_E65FE513D615AF4C679A7391D656140A" xlink:to="loc_srt_ConsolidationItemsDomain_DD6928419CD24133D68B7391D6565C33_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_DD6928419CD24133D68B7391D6565C33" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_E65FE513D615AF4C679A7391D656140A" xlink:to="loc_srt_ConsolidationItemsDomain_DD6928419CD24133D68B7391D6565C33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_A6CB8F3E198E42A40EB67391D656DB26" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_DD6928419CD24133D68B7391D6565C33" xlink:to="loc_us-gaap_OperatingSegmentsMember_A6CB8F3E198E42A40EB67391D656DB26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_7114F2F417CD84C11EE37391D6560412" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_DD6928419CD24133D68B7391D6565C33" xlink:to="loc_us-gaap_CorporateNonSegmentMember_7114F2F417CD84C11EE37391D6560412" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_EFD84B09B1185E7D13FA7391D6579FCF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2BEF72C78D9D85E6CBD07391D655E2AD" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_EFD84B09B1185E7D13FA7391D6579FCF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_3A8E17962FE828F6D1537391D657F9FE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_EFD84B09B1185E7D13FA7391D6579FCF" xlink:to="loc_us-gaap_SegmentDomain_3A8E17962FE828F6D1537391D657F9FE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_3A8E17962FE828F6D1537391D657F9FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_EFD84B09B1185E7D13FA7391D6579FCF" xlink:to="loc_us-gaap_SegmentDomain_3A8E17962FE828F6D1537391D657F9FE" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_NeuromodulationMember" xlink:label="loc_livn_NeuromodulationMember_A52884B2B29F8321BD837391D657BB52" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3A8E17962FE828F6D1537391D657F9FE" xlink:to="loc_livn_NeuromodulationMember_A52884B2B29F8321BD837391D657BB52" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CardiacSurgeryMember" xlink:label="loc_livn_CardiacSurgeryMember_33F695E434CF50AB6A6E7391D65757CF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3A8E17962FE828F6D1537391D657F9FE" xlink:to="loc_livn_CardiacSurgeryMember_33F695E434CF50AB6A6E7391D65757CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_4F11D5935FD1E4D2FD967391D65842AB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E7691219FAC7667573E37391D657A730" xlink:to="loc_us-gaap_GoodwillRollForward_4F11D5935FD1E4D2FD967391D65842AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_3D920F1E8DA30FC718C47391D658DB85" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_4F11D5935FD1E4D2FD967391D65842AB" xlink:to="loc_us-gaap_Goodwill_3D920F1E8DA30FC718C47391D658DB85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_88743C5E08CF4F5CAA667391D65877F7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_4F11D5935FD1E4D2FD967391D65842AB" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_88743C5E08CF4F5CAA667391D65877F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments" xlink:label="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_ABE173DADACAB9A52BC77391D658D5FB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_4F11D5935FD1E4D2FD967391D65842AB" xlink:to="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_ABE173DADACAB9A52BC77391D658D5FB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformationGeographicAreasDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_F217E93B5C5F80513EC9463B8717AA22" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_64F3892368EB5F14A16B463B871592BB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_F217E93B5C5F80513EC9463B8717AA22" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_64F3892368EB5F14A16B463B871592BB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_3DF684FABD7F1968E574463B87161AF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_64F3892368EB5F14A16B463B871592BB" xlink:to="loc_srt_StatementGeographicalAxis_3DF684FABD7F1968E574463B87161AF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_B4DA8E5F483EECC79CD0463B87169E3C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_3DF684FABD7F1968E574463B87161AF5" xlink:to="loc_srt_SegmentGeographicalDomain_B4DA8E5F483EECC79CD0463B87169E3C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_B4DA8E5F483EECC79CD0463B87169E3C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_3DF684FABD7F1968E574463B87161AF5" xlink:to="loc_srt_SegmentGeographicalDomain_B4DA8E5F483EECC79CD0463B87169E3C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_F92335A34425C897F9A6463B8716EA5F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_B4DA8E5F483EECC79CD0463B87169E3C" xlink:to="loc_country_US_F92335A34425C897F9A6463B8716EA5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_EuropeMember" xlink:label="loc_srt_EuropeMember_3F7A496E7FC43CED6ECB463B871705A0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_B4DA8E5F483EECC79CD0463B87169E3C" xlink:to="loc_srt_EuropeMember_3F7A496E7FC43CED6ECB463B871705A0" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_RestOfWorldMember" xlink:label="loc_livn_RestOfWorldMember_7175FAF081B5DBE8EFC6463B8717F4F1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_B4DA8E5F483EECC79CD0463B87169E3C" xlink:to="loc_livn_RestOfWorldMember_7175FAF081B5DBE8EFC6463B8717F4F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_AEDE9F099820101244D4463B871774BB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_F217E93B5C5F80513EC9463B8717AA22" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_AEDE9F099820101244D4463B871774BB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformationSegmentInfoDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_740DD5D78D7631FAA26B7391D6611658" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_740DD5D78D7631FAA26B7391D6611658" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_536DCA9562D086602C8F7391D661F23A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_740DD5D78D7631FAA26B7391D6611658" xlink:to="loc_srt_ProductOrServiceAxis_536DCA9562D086602C8F7391D661F23A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_B692E1F07898DADA84C77391D662304B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_536DCA9562D086602C8F7391D661F23A" xlink:to="loc_srt_ProductsAndServicesDomain_B692E1F07898DADA84C77391D662304B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_B692E1F07898DADA84C77391D662304B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_536DCA9562D086602C8F7391D661F23A" xlink:to="loc_srt_ProductsAndServicesDomain_B692E1F07898DADA84C77391D662304B" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CardiopulmonaryMember" xlink:label="loc_livn_CardiopulmonaryMember_7D1B613ED6933A705F087391D6624054" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_B692E1F07898DADA84C77391D662304B" xlink:to="loc_livn_CardiopulmonaryMember_7D1B613ED6933A705F087391D6624054" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_HeartValvesMember" xlink:label="loc_livn_HeartValvesMember_54A917BDF83C265792CB7391D662BC1F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_B692E1F07898DADA84C77391D662304B" xlink:to="loc_livn_HeartValvesMember_54A917BDF83C265792CB7391D662BC1F" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_AdvancedCirculatorySupportMember" xlink:label="loc_livn_AdvancedCirculatorySupportMember_BD600B93AB2FE6343AF17391D663526F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_B692E1F07898DADA84C77391D662304B" xlink:to="loc_livn_AdvancedCirculatorySupportMember_BD600B93AB2FE6343AF17391D663526F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_49B69B83AC642662B7197391D663C66D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_740DD5D78D7631FAA26B7391D6611658" xlink:to="loc_srt_StatementGeographicalAxis_49B69B83AC642662B7197391D663C66D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_949BC675E7761F5D39F97391D6630163_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_49B69B83AC642662B7197391D663C66D" xlink:to="loc_srt_SegmentGeographicalDomain_949BC675E7761F5D39F97391D6630163_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_949BC675E7761F5D39F97391D6630163" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_49B69B83AC642662B7197391D663C66D" xlink:to="loc_srt_SegmentGeographicalDomain_949BC675E7761F5D39F97391D6630163" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_A509E823BA199822C41D7391D66358EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_949BC675E7761F5D39F97391D6630163" xlink:to="loc_country_US_A509E823BA199822C41D7391D66358EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_EuropeMember" xlink:label="loc_srt_EuropeMember_30EB74F637213F357D397391D6635A70" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_949BC675E7761F5D39F97391D6630163" xlink:to="loc_srt_EuropeMember_30EB74F637213F357D397391D6635A70" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_RestOfWorldMember" xlink:label="loc_livn_RestOfWorldMember_984B4DEEAD046A8399317391D66449EC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_949BC675E7761F5D39F97391D6630163" xlink:to="loc_livn_RestOfWorldMember_984B4DEEAD046A8399317391D66449EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOperatingActivitiesSegmentAxis" xlink:label="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_F4F9D333D674D9A37C6E7391D664A36C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_740DD5D78D7631FAA26B7391D6611658" xlink:to="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_F4F9D333D674D9A37C6E7391D664A36C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_D44D935E829936DF4A017391D6642E9C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_F4F9D333D674D9A37C6E7391D664A36C" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_D44D935E829936DF4A017391D6642E9C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_D44D935E829936DF4A017391D6642E9C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_F4F9D333D674D9A37C6E7391D664A36C" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_D44D935E829936DF4A017391D6642E9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentContinuingOperationsMember" xlink:label="loc_us-gaap_SegmentContinuingOperationsMember_E822100D99137E8B49CB7391D6648C6E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentOperatingActivitiesDomain_D44D935E829936DF4A017391D6642E9C" xlink:to="loc_us-gaap_SegmentContinuingOperationsMember_E822100D99137E8B49CB7391D6648C6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="loc_us-gaap_SegmentDiscontinuedOperationsMember_70512EC149CC09CF8B797391D664FDE1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentOperatingActivitiesDomain_D44D935E829936DF4A017391D6642E9C" xlink:to="loc_us-gaap_SegmentDiscontinuedOperationsMember_70512EC149CC09CF8B797391D664FDE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_A0CE71B32BADA67B63657391D6653478" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_740DD5D78D7631FAA26B7391D6611658" xlink:to="loc_srt_ConsolidationItemsAxis_A0CE71B32BADA67B63657391D6653478" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_4CFB6FD3F3078F5847BD7391D6653E7A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_A0CE71B32BADA67B63657391D6653478" xlink:to="loc_srt_ConsolidationItemsDomain_4CFB6FD3F3078F5847BD7391D6653E7A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_4CFB6FD3F3078F5847BD7391D6653E7A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_A0CE71B32BADA67B63657391D6653478" xlink:to="loc_srt_ConsolidationItemsDomain_4CFB6FD3F3078F5847BD7391D6653E7A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_3925BE3D0EDBF77B81277391D6654590" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_4CFB6FD3F3078F5847BD7391D6653E7A" xlink:to="loc_us-gaap_OperatingSegmentsMember_3925BE3D0EDBF77B81277391D6654590" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_9645FC4830BCA779C8D77391D665E97B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_4CFB6FD3F3078F5847BD7391D6653E7A" xlink:to="loc_us-gaap_CorporateNonSegmentMember_9645FC4830BCA779C8D77391D665E97B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_40529A09B828B60167CA7391D666518F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_740DD5D78D7631FAA26B7391D6611658" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_40529A09B828B60167CA7391D666518F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_2DDD9BD1776E94A874987391D666E073_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_40529A09B828B60167CA7391D666518F" xlink:to="loc_us-gaap_SegmentDomain_2DDD9BD1776E94A874987391D666E073_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_2DDD9BD1776E94A874987391D666E073" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_40529A09B828B60167CA7391D666518F" xlink:to="loc_us-gaap_SegmentDomain_2DDD9BD1776E94A874987391D666E073" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CardiacSurgeryMember" xlink:label="loc_livn_CardiacSurgeryMember_151CCD2933ABBB88AF0E7391D66661F4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2DDD9BD1776E94A874987391D666E073" xlink:to="loc_livn_CardiacSurgeryMember_151CCD2933ABBB88AF0E7391D66661F4" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_NeuromodulationMember" xlink:label="loc_livn_NeuromodulationMember_DFC52F813818EACE4AF37391D666B14D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2DDD9BD1776E94A874987391D666E073" xlink:to="loc_livn_NeuromodulationMember_DFC52F813818EACE4AF37391D666B14D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_A59B20628853A2234F4F7391D667EBCA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_NumberOfReportableSegments_A59B20628853A2234F4F7391D667EBCA" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_NumberofGeographicRegionsinwhichEntityOperates" xlink:label="loc_livn_NumberofGeographicRegionsinwhichEntityOperates_501BD8E24BB0EEF24A557391D667649F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_livn_NumberofGeographicRegionsinwhichEntityOperates_501BD8E24BB0EEF24A557391D667649F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0B71B8B1EE42EE24456B7391D667083D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0B71B8B1EE42EE24456B7391D667083D" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_IncomeLossfromReportableSegmentsbeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_livn_IncomeLossfromReportableSegmentsbeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_EF7B6EF33959D41E71527391D6673D36" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_livn_IncomeLossfromReportableSegmentsbeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_EF7B6EF33959D41E71527391D6673D36" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_FBCCE4D21851FB2FBAE67391D667B2E3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_FBCCE4D21851FB2FBAE67391D667B2E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_2A7D6B2EC7D19EBACCB67391D667455A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_RestructuringCharges_2A7D6B2EC7D19EBACCB67391D667455A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_383E2DFF2819F3EE38567391D66874FA" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_383E2DFF2819F3EE38567391D66874FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_B3BAD30E2B81CC0008377391D668F614" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_OperatingIncomeLoss_B3BAD30E2B81CC0008377391D668F614" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_DDC0C34F73C17BBDE3CC7391D66800F1" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_InvestmentIncomeInterest_DDC0C34F73C17BBDE3CC7391D66800F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_FAEC82E2536F684B402A7391D6688B59" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_InterestExpense_FAEC82E2536F684B402A7391D6688B59" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain" xlink:label="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain_2530ED39440E0EE947B27393E8C3A9F8" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain_2530ED39440E0EE947B27393E8C3A9F8" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_ForeignCurrencyTransactionGainLossandOtherNonoperatingIncome" xlink:label="loc_livn_ForeignCurrencyTransactionGainLossandOtherNonoperatingIncome_0B02CA5BA46BB456D0C47391D668B562" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_livn_ForeignCurrencyTransactionGainLossandOtherNonoperatingIncome_0B02CA5BA46BB456D0C47391D668B562" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_BA32D2C8AE23E8CDF6E77391D6696589" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_BA32D2C8AE23E8CDF6E77391D6696589" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_A3BDA8B08BE673D563467391D669A92F" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_Assets_A3BDA8B08BE673D563467391D669A92F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAdditions" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAdditions_8EF352407C070A7F50AE7391D66964EE" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6A750ED73A2821B882E47391D666F927" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAdditions_8EF352407C070A7F50AE7391D66964EE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/GeographicAndSegmentInformationTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/IncomeTaxes" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/Investments" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/InvestmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0519055B7DCD2F0C3A8B6BDA6E62343D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfCostMethodInvestmentsTable" xlink:label="loc_us-gaap_ScheduleOfCostMethodInvestmentsTable_10EC97FB2083059628B26BB36C2B23C4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0519055B7DCD2F0C3A8B6BDA6E62343D" xlink:to="loc_us-gaap_ScheduleOfCostMethodInvestmentsTable_10EC97FB2083059628B26BB36C2B23C4" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_3FFE1EC0E41E6F1F5EAD6BB36C2C5BE1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCostMethodInvestmentsTable_10EC97FB2083059628B26BB36C2B23C4" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_3FFE1EC0E41E6F1F5EAD6BB36C2C5BE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_3FFE1EC0E41E6F1F5EAD6BB36C2C5BE1" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_3FFE1EC0E41E6F1F5EAD6BB36C2C5BE1" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_RespicardiaMember" xlink:label="loc_livn_RespicardiaMember_959A21DE04ABB90BC2126BB36C2C31E6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038" xlink:to="loc_livn_RespicardiaMember_959A21DE04ABB90BC2126BB36C2C31E6" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CeribellInc.Member" xlink:label="loc_livn_CeribellInc.Member_A04A9C4D90EBFFB2BF836BB36C2DEEBF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038" xlink:to="loc_livn_CeribellInc.Member_A04A9C4D90EBFFB2BF836BB36C2DEEBF" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_RainbowMedicalLtd.Member" xlink:label="loc_livn_RainbowMedicalLtd.Member_D4D4A8FD7AA9F8D975176BB36C2D410C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038" xlink:to="loc_livn_RainbowMedicalLtd.Member_D4D4A8FD7AA9F8D975176BB36C2D410C" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_MDStartIIMember" xlink:label="loc_livn_MDStartIIMember_451427AC575DE7B792756BB36C2DDCF6" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038" xlink:to="loc_livn_MDStartIIMember_451427AC575DE7B792756BB36C2DDCF6" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_HighlifeS.A.S.Member" xlink:label="loc_livn_HighlifeS.A.S.Member_9B830C3E73D06573339C6BB36C2D7719" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038" xlink:to="loc_livn_HighlifeS.A.S.Member_9B830C3E73D06573339C6BB36C2D7719" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_OtherMember" xlink:label="loc_livn_OtherMember_B3CC117AADB004FFF90F6BB36C2D1B91" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_A334699BE7768BD645FF6BB36C2C5038" xlink:to="loc_livn_OtherMember_B3CC117AADB004FFF90F6BB36C2D1B91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_48C8DFEEF9661A30A5316BB36C2D7501" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCostMethodInvestmentsTable_10EC97FB2083059628B26BB36C2B23C4" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_48C8DFEEF9661A30A5316BB36C2D7501" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_9D0C518E8D851ED6BE976BB36C2DC24D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_48C8DFEEF9661A30A5316BB36C2D7501" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_9D0C518E8D851ED6BE976BB36C2DC24D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_9D0C518E8D851ED6BE976BB36C2DC24D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_48C8DFEEF9661A30A5316BB36C2D7501" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_9D0C518E8D851ED6BE976BB36C2DC24D" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CostMethodInvesteeMember" xlink:label="loc_livn_CostMethodInvesteeMember_EFF362CDA8EEA1B9FE2F6BB36C2EFD6A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_9D0C518E8D851ED6BE976BB36C2DC24D" xlink:to="loc_livn_CostMethodInvesteeMember_EFF362CDA8EEA1B9FE2F6BB36C2EFD6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_BD44F015359EFFA546C66BB36C2EF98D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCostMethodInvestmentsTable_10EC97FB2083059628B26BB36C2B23C4" xlink:to="loc_srt_CounterpartyNameAxis_BD44F015359EFFA546C66BB36C2EF98D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_65897054CD410744AD8D6BB36C2E7706_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_BD44F015359EFFA546C66BB36C2EF98D" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_65897054CD410744AD8D6BB36C2E7706_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_65897054CD410744AD8D6BB36C2E7706" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_BD44F015359EFFA546C66BB36C2EF98D" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_65897054CD410744AD8D6BB36C2E7706" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_RespicardiaMember" xlink:label="loc_livn_RespicardiaMember_FD43E0F5B542306A5C6D6BB36C2EF68B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_65897054CD410744AD8D6BB36C2E7706" xlink:to="loc_livn_RespicardiaMember_FD43E0F5B542306A5C6D6BB36C2EF68B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_F06E2F08A45808A196BD6BB36C2FDEAE" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCostMethodInvestmentsTable_10EC97FB2083059628B26BB36C2B23C4" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_F06E2F08A45808A196BD6BB36C2FDEAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_9EE7816FF492B5E6DAA36BB36C2F191C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_F06E2F08A45808A196BD6BB36C2FDEAE" xlink:to="loc_us-gaap_RelatedPartyDomain_9EE7816FF492B5E6DAA36BB36C2F191C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_9EE7816FF492B5E6DAA36BB36C2F191C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_F06E2F08A45808A196BD6BB36C2FDEAE" xlink:to="loc_us-gaap_RelatedPartyDomain_9EE7816FF492B5E6DAA36BB36C2F191C" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CostMethodInvesteeMember" xlink:label="loc_livn_CostMethodInvesteeMember_4154C4B2FA8EF558CE7A6BB36C2F85BF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_9EE7816FF492B5E6DAA36BB36C2F191C" xlink:to="loc_livn_CostMethodInvesteeMember_4154C4B2FA8EF558CE7A6BB36C2F85BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_6CE50DB4CC50108F46216BB36C2F63EF" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCostMethodInvestmentsTable_10EC97FB2083059628B26BB36C2B23C4" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_6CE50DB4CC50108F46216BB36C2F63EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_F2F8C6349307B5038B6E6BB36C30025D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6CE50DB4CC50108F46216BB36C2F63EF" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_F2F8C6349307B5038B6E6BB36C30025D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_F2F8C6349307B5038B6E6BB36C30025D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6CE50DB4CC50108F46216BB36C2F63EF" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_F2F8C6349307B5038B6E6BB36C30025D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_ADC5B11E77724297634D6BB36C30BC94" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_F2F8C6349307B5038B6E6BB36C30025D" xlink:to="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_ADC5B11E77724297634D6BB36C30BC94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_8E3EF0E07F151EA31BD96BDA6E6A1573" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0519055B7DCD2F0C3A8B6BDA6E62343D" xlink:to="loc_us-gaap_EquityMethodInvestments_8E3EF0E07F151EA31BD96BDA6E6A1573" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableNet" xlink:label="loc_us-gaap_LoansReceivableNet_F0F377227B0864A29F1D6BDA6E6A0318" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0519055B7DCD2F0C3A8B6BDA6E62343D" xlink:to="loc_us-gaap_LoansReceivableNet_F0F377227B0864A29F1D6BDA6E6A0318" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/InvestmentsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/Leases" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/LeasesCashFlowDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/LeasesComponentsOfOperatingLeaseAssetsAndLiabilitiesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/LeasesContractualMaturitiesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/LeasesCostsDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/LeasesFutureMinimumOperatingLeasePaymentsDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/LeasesLeaseTermAndDiscountRateDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/LeasesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/NetIncomePerShare" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/NetIncomePerShareNarrativeOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5E920F2D46ECD42D41FF463B873054B7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_9F1B94D27A03A9F5EA9F463B872E36DB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5E920F2D46ECD42D41FF463B873054B7" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_9F1B94D27A03A9F5EA9F463B872E36DB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_263E61A1AD5D5C65264F463B872F6DA3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_9F1B94D27A03A9F5EA9F463B872E36DB" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_263E61A1AD5D5C65264F463B872F6DA3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_26A4B3D4D585468C11BA463B872F0F01_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_263E61A1AD5D5C65264F463B872F6DA3" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_26A4B3D4D585468C11BA463B872F0F01_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_26A4B3D4D585468C11BA463B872F0F01" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_263E61A1AD5D5C65264F463B872F6DA3" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_26A4B3D4D585468C11BA463B872F0F01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockCompensationPlanMember" xlink:label="loc_us-gaap_StockCompensationPlanMember_1EFBEA83E3015E40D381463B872F2BF1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_26A4B3D4D585468C11BA463B872F0F01" xlink:to="loc_us-gaap_StockCompensationPlanMember_1EFBEA83E3015E40D381463B872F2BF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_C23710B722A60FA3D56A463B87301C4C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5E920F2D46ECD42D41FF463B873054B7" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_C23710B722A60FA3D56A463B87301C4C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/NetIncomePerShareScheduleOfEarningsPerShareBasicAndDilutedDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/NetIncomePerShareTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/NewAccountingPronouncements" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/NewAccountingPronouncementsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_B727B0E1C5B0B005F49C5A527CB91651" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_1471B6608C393F9C54445A527CB70928" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_B727B0E1C5B0B005F49C5A527CB91651" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_1471B6608C393F9C54445A527CB70928" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_F2185133F5B0DCFA7C895A527CB8E280" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_1471B6608C393F9C54445A527CB70928" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_F2185133F5B0DCFA7C895A527CB8E280" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_D25DE084AF72FA3559E85A527CB8A71D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_F2185133F5B0DCFA7C895A527CB8E280" xlink:to="loc_us-gaap_TypeOfAdoptionMember_D25DE084AF72FA3559E85A527CB8A71D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_D25DE084AF72FA3559E85A527CB8A71D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_F2185133F5B0DCFA7C895A527CB8E280" xlink:to="loc_us-gaap_TypeOfAdoptionMember_D25DE084AF72FA3559E85A527CB8A71D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201602Member_53BA45A68CDC0198C9C55A527CB8A1B1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_D25DE084AF72FA3559E85A527CB8A71D" xlink:to="loc_us-gaap_AccountingStandardsUpdate201602Member_53BA45A68CDC0198C9C55A527CB8A1B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_41653A2BC697DEFD545B5A527CB9B30E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_B727B0E1C5B0B005F49C5A527CB91651" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_41653A2BC697DEFD545B5A527CB9B30E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_73475959087409500EEF5A527CB94A5E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_B727B0E1C5B0B005F49C5A527CB91651" xlink:to="loc_us-gaap_OperatingLeaseLiability_73475959087409500EEF5A527CB94A5E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/NewAccountingPronouncementsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/ProductRemediationLiability" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/ProductRemediationLiabilityDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/ProductRemediationLiabilityTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/Restructuring" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/RestructuringNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_4566909574E09DD2802E463B88A3AFD8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1F81125884088A12DBEF463B88A1BE12" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4566909574E09DD2802E463B88A3AFD8" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1F81125884088A12DBEF463B88A1BE12" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringPlanAxis" xlink:label="loc_us-gaap_RestructuringPlanAxis_2F26604CF32BABADD926463B88A156A7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1F81125884088A12DBEF463B88A1BE12" xlink:to="loc_us-gaap_RestructuringPlanAxis_2F26604CF32BABADD926463B88A156A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringPlanDomain" xlink:label="loc_us-gaap_RestructuringPlanDomain_72C5C853875F38B45B2D463B88A1EC99_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_2F26604CF32BABADD926463B88A156A7" xlink:to="loc_us-gaap_RestructuringPlanDomain_72C5C853875F38B45B2D463B88A1EC99_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringPlanDomain" xlink:label="loc_us-gaap_RestructuringPlanDomain_72C5C853875F38B45B2D463B88A1EC99" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_2F26604CF32BABADD926463B88A156A7" xlink:to="loc_us-gaap_RestructuringPlanDomain_72C5C853875F38B45B2D463B88A1EC99" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_A2018ReorganizationPlanMember" xlink:label="loc_livn_A2018ReorganizationPlanMember_9EA9888481989BC53DFD463B88A1EF2A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_72C5C853875F38B45B2D463B88A1EC99" xlink:to="loc_livn_A2018ReorganizationPlanMember_9EA9888481989BC53DFD463B88A1EF2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_A9F92A7FBE634039AEBE463B88A2EC83" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1F81125884088A12DBEF463B88A1BE12" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_A9F92A7FBE634039AEBE463B88A2EC83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_61A0C45BBAEFDD248765463B88A243A8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A9F92A7FBE634039AEBE463B88A2EC83" xlink:to="loc_us-gaap_SegmentDomain_61A0C45BBAEFDD248765463B88A243A8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_61A0C45BBAEFDD248765463B88A243A8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A9F92A7FBE634039AEBE463B88A2EC83" xlink:to="loc_us-gaap_SegmentDomain_61A0C45BBAEFDD248765463B88A243A8" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CardiacSurgeryMember" xlink:label="loc_livn_CardiacSurgeryMember_3CB99F9AEFF4E90AB9CC463B88A28706" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_61A0C45BBAEFDD248765463B88A243A8" xlink:to="loc_livn_CardiacSurgeryMember_3CB99F9AEFF4E90AB9CC463B88A28706" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated_270637B2D4F3BF070F0B463B88A3763E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4566909574E09DD2802E463B88A3AFD8" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated_270637B2D4F3BF070F0B463B88A3763E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/RestructuringRestructuingAndRelatedCostsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_65DFC3EDD55DF8E041017391A7499979" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_20FCE7442DCAFD1F5B657391A7445794" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_65DFC3EDD55DF8E041017391A7499979" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_20FCE7442DCAFD1F5B657391A7445794" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringPlanAxis" xlink:label="loc_us-gaap_RestructuringPlanAxis_28EFC55AAF1125A30C6D7391A7457CCC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_20FCE7442DCAFD1F5B657391A7445794" xlink:to="loc_us-gaap_RestructuringPlanAxis_28EFC55AAF1125A30C6D7391A7457CCC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringPlanDomain" xlink:label="loc_us-gaap_RestructuringPlanDomain_E6A6926CF0EF396FB0407391A7454AC9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_28EFC55AAF1125A30C6D7391A7457CCC" xlink:to="loc_us-gaap_RestructuringPlanDomain_E6A6926CF0EF396FB0407391A7454AC9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringPlanDomain" xlink:label="loc_us-gaap_RestructuringPlanDomain_E6A6926CF0EF396FB0407391A7454AC9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_28EFC55AAF1125A30C6D7391A7457CCC" xlink:to="loc_us-gaap_RestructuringPlanDomain_E6A6926CF0EF396FB0407391A7454AC9" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_TwoThousandFifteenandSixteenReorganizationPlansMember" xlink:label="loc_livn_TwoThousandFifteenandSixteenReorganizationPlansMember_2CB727BE7FF3B0A1F7BB7391A745605F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_E6A6926CF0EF396FB0407391A7454AC9" xlink:to="loc_livn_TwoThousandFifteenandSixteenReorganizationPlansMember_2CB727BE7FF3B0A1F7BB7391A745605F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_5BD6F1AB620EAA11A6247391A7469F75" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_20FCE7442DCAFD1F5B657391A7445794" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_5BD6F1AB620EAA11A6247391A7469F75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_4379AAEF8AA7E27126117391A74663B7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_5BD6F1AB620EAA11A6247391A7469F75" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_4379AAEF8AA7E27126117391A74663B7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_4379AAEF8AA7E27126117391A74663B7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_5BD6F1AB620EAA11A6247391A7469F75" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_4379AAEF8AA7E27126117391A74663B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="loc_us-gaap_EmployeeSeveranceMember_FE10BB51E950F956E4C47391A746E802" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_4379AAEF8AA7E27126117391A74663B7" xlink:to="loc_us-gaap_EmployeeSeveranceMember_FE10BB51E950F956E4C47391A746E802" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherRestructuringMember" xlink:label="loc_us-gaap_OtherRestructuringMember_6AF38387CF12E43E81E07391A748A741" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_4379AAEF8AA7E27126117391A74663B7" xlink:to="loc_us-gaap_OtherRestructuringMember_6AF38387CF12E43E81E07391A748A741" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="loc_us-gaap_RestructuringReserveRollForward_F4C9FCC1EEC2F9B7010F7391A749B7AE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_65DFC3EDD55DF8E041017391A7499979" xlink:to="loc_us-gaap_RestructuringReserveRollForward_F4C9FCC1EEC2F9B7010F7391A749B7AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringReserve" xlink:label="loc_us-gaap_RestructuringReserve_278FEDEF6C150C35691C7391A7496441" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_F4C9FCC1EEC2F9B7010F7391A749B7AE" xlink:to="loc_us-gaap_RestructuringReserve_278FEDEF6C150C35691C7391A7496441" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_6BE5F1615F3F4F27FDA37391A749C33B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_F4C9FCC1EEC2F9B7010F7391A749B7AE" xlink:to="loc_us-gaap_RestructuringCharges_6BE5F1615F3F4F27FDA37391A749C33B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:label="loc_us-gaap_PaymentsForRestructuring_BCC0656B484D75BD80F77391A74A583E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_F4C9FCC1EEC2F9B7010F7391A749B7AE" xlink:to="loc_us-gaap_PaymentsForRestructuring_BCC0656B484D75BD80F77391A74A583E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/RestructuringRestructuringExpenseBySegmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_243A53E9E157EC9625B2463B8896A350" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_577027034C310307833A463B8894FB51" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_243A53E9E157EC9625B2463B8896A350" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_577027034C310307833A463B8894FB51" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_509415F010C569D5C60F463B8894998F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_577027034C310307833A463B8894FB51" xlink:to="loc_srt_ConsolidationItemsAxis_509415F010C569D5C60F463B8894998F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_E0459A770D533414C99F463B8895BA42_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_509415F010C569D5C60F463B8894998F" xlink:to="loc_srt_ConsolidationItemsDomain_E0459A770D533414C99F463B8895BA42_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_E0459A770D533414C99F463B8895BA42" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_509415F010C569D5C60F463B8894998F" xlink:to="loc_srt_ConsolidationItemsDomain_E0459A770D533414C99F463B8895BA42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_D77F6F53E4E2CEA3F240463B889500A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_E0459A770D533414C99F463B8895BA42" xlink:to="loc_us-gaap_OperatingSegmentsMember_D77F6F53E4E2CEA3F240463B889500A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_6B4730EF6CA2EB9E132A463B8895DCB0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_E0459A770D533414C99F463B8895BA42" xlink:to="loc_us-gaap_CorporateNonSegmentMember_6B4730EF6CA2EB9E132A463B8895DCB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_6D26EC9BA6636C195AC0463B889520E8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_577027034C310307833A463B8894FB51" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_6D26EC9BA6636C195AC0463B889520E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_1541E3E4F92AEA50A649463B8896254C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6D26EC9BA6636C195AC0463B889520E8" xlink:to="loc_us-gaap_SegmentDomain_1541E3E4F92AEA50A649463B8896254C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_1541E3E4F92AEA50A649463B8896254C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6D26EC9BA6636C195AC0463B889520E8" xlink:to="loc_us-gaap_SegmentDomain_1541E3E4F92AEA50A649463B8896254C" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_CardiacSurgeryMember" xlink:label="loc_livn_CardiacSurgeryMember_B3C974AC5B4C9FCFD2B2463B889678A8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_1541E3E4F92AEA50A649463B8896254C" xlink:to="loc_livn_CardiacSurgeryMember_B3C974AC5B4C9FCFD2B2463B889678A8" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_NeuromodulationMember" xlink:label="loc_livn_NeuromodulationMember_43FA1454EE1C425EE60E463B8896F217" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_1541E3E4F92AEA50A649463B8896254C" xlink:to="loc_livn_NeuromodulationMember_43FA1454EE1C425EE60E463B8896F217" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_FE133BD59D2C580D7338463B88969215" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_243A53E9E157EC9625B2463B8896A350" xlink:to="loc_us-gaap_RestructuringCharges_FE133BD59D2C580D7338463B88969215" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/RestructuringTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/StockBasedIncentivePlanCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E17E62A230652B5177365A527DAD52E5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B5E564FAB96EC28C58015A527DAB578B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E17E62A230652B5177365A527DAD52E5" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B5E564FAB96EC28C58015A527DAB578B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_EF396BE4087CB7FCF61C5A527DAC78D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B5E564FAB96EC28C58015A527DAB578B" xlink:to="loc_us-gaap_AwardTypeAxis_EF396BE4087CB7FCF61C5A527DAC78D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_651C9139D7162FC3D15C5A527DAC36D5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_EF396BE4087CB7FCF61C5A527DAC78D3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_651C9139D7162FC3D15C5A527DAC36D5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_651C9139D7162FC3D15C5A527DAC36D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_EF396BE4087CB7FCF61C5A527DAC78D3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_651C9139D7162FC3D15C5A527DAC36D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_EE68FFDFF09C8A56C2325A527DACF934" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_651C9139D7162FC3D15C5A527DAC36D5" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_EE68FFDFF09C8A56C2325A527DACF934" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockAppreciationRightsSARSMember" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember_74D1AF64120943AF67F45A527DAC6753" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_651C9139D7162FC3D15C5A527DAC36D5" xlink:to="loc_us-gaap_StockAppreciationRightsSARSMember_74D1AF64120943AF67F45A527DAC6753" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_MarketbasedPerformanceRestrictedStockUnitMember" xlink:label="loc_livn_MarketbasedPerformanceRestrictedStockUnitMember_5CBAA6B1369E1A0AC5485A527DADDD42" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_651C9139D7162FC3D15C5A527DAC36D5" xlink:to="loc_livn_MarketbasedPerformanceRestrictedStockUnitMember_5CBAA6B1369E1A0AC5485A527DADDD42" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_OperatingPerformancebasedRestrictedStockUnitsMember" xlink:label="loc_livn_OperatingPerformancebasedRestrictedStockUnitsMember_BDBD887D28A83011E1185A527DADED51" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_651C9139D7162FC3D15C5A527DAC36D5" xlink:to="loc_livn_OperatingPerformancebasedRestrictedStockUnitsMember_BDBD887D28A83011E1185A527DADED51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_829D1DC6C16A8BC5C77B5AA461AF18FD" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_651C9139D7162FC3D15C5A527DAC36D5" xlink:to="loc_us-gaap_EmployeeStockOptionMember_829D1DC6C16A8BC5C77B5AA461AF18FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_2A724776D00AA11818545A527DAD6EAA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E17E62A230652B5177365A527DAD52E5" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_2A724776D00AA11818545A527DAD6EAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_6DA297A42F0D59587B8F5A527DAEFA4E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E17E62A230652B5177365A527DAD52E5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_6DA297A42F0D59587B8F5A527DAEFA4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_D9D6070B71024D8FDDFE5A527DAE6285" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E17E62A230652B5177365A527DAD52E5" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_D9D6070B71024D8FDDFE5A527DAE6285" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/StockBasedIncentivePlanExecutedAgreementsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ECBC38868E9B453E0DFF463B8741BE96" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5F82043DE3B9AD857766463B8740BC88" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ECBC38868E9B453E0DFF463B8741BE96" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5F82043DE3B9AD857766463B8740BC88" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_562B9F6BBD638C3849E2463B874053D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5F82043DE3B9AD857766463B8740BC88" xlink:to="loc_us-gaap_AwardTypeAxis_562B9F6BBD638C3849E2463B874053D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0A23890F2733BCE1211E463B87403393_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_562B9F6BBD638C3849E2463B874053D7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0A23890F2733BCE1211E463B87403393_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0A23890F2733BCE1211E463B87403393" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_562B9F6BBD638C3849E2463B874053D7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0A23890F2733BCE1211E463B87403393" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockAppreciationRightsSARSMember" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember_275260C6C504019AE4D1463B87408899" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0A23890F2733BCE1211E463B87403393" xlink:to="loc_us-gaap_StockAppreciationRightsSARSMember_275260C6C504019AE4D1463B87408899" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_F7FFBA5F08F12E4FBA38463B87410A9A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0A23890F2733BCE1211E463B87403393" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_F7FFBA5F08F12E4FBA38463B87410A9A" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_MarketbasedPerformanceRestrictedStockUnitMember" xlink:label="loc_livn_MarketbasedPerformanceRestrictedStockUnitMember_C90574B32242DFDADF3E463B87419D61" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0A23890F2733BCE1211E463B87403393" xlink:to="loc_livn_MarketbasedPerformanceRestrictedStockUnitMember_C90574B32242DFDADF3E463B87419D61" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_OperatingPerformancebasedRestrictedStockUnitsMember" xlink:label="loc_livn_OperatingPerformancebasedRestrictedStockUnitsMember_19097DCD360908A9A8C8463B87410070" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0A23890F2733BCE1211E463B87403393" xlink:to="loc_livn_OperatingPerformancebasedRestrictedStockUnitsMember_19097DCD360908A9A8C8463B87410070" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_01014FA409529E3820D8463B8741D4A3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ECBC38868E9B453E0DFF463B8741BE96" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_01014FA409529E3820D8463B8741D4A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_EC9971C267A9EEAFBAB8463B8741C37C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ECBC38868E9B453E0DFF463B8741BE96" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_EC9971C267A9EEAFBAB8463B8741C37C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/StockBasedIncentivePlanTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/StockBasedIncentivePlans" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/StockholdersEquity" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/StockholdersEquityComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E473DC321FB541B758615A527DB94C9A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_C95C5227B3B173AC12895A527DB8C014" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E473DC321FB541B758615A527DB94C9A" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_C95C5227B3B173AC12895A527DB8C014" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_BF4FDAE12605C8511FCF5A527DB8A563" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_C95C5227B3B173AC12895A527DB8C014" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_BF4FDAE12605C8511FCF5A527DB8A563" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_1D1A4DBF6510E8C2E6C55A527DB8049F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_BF4FDAE12605C8511FCF5A527DB8A563" xlink:to="loc_us-gaap_EquityComponentDomain_1D1A4DBF6510E8C2E6C55A527DB8049F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_1D1A4DBF6510E8C2E6C55A527DB8049F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_BF4FDAE12605C8511FCF5A527DB8A563" xlink:to="loc_us-gaap_EquityComponentDomain_1D1A4DBF6510E8C2E6C55A527DB8049F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_D9127376EA1F01B889B65A527DB8C1E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1D1A4DBF6510E8C2E6C55A527DB8049F" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_D9127376EA1F01B889B65A527DB8C1E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_898BDB896C0C17A822B15A527DB9C9B7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1D1A4DBF6510E8C2E6C55A527DB8049F" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_898BDB896C0C17A822B15A527DB9C9B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_1A2E1641D2F424D433C05A527DB95464" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1D1A4DBF6510E8C2E6C55A527DB8049F" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_1A2E1641D2F424D433C05A527DB95464" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_AccumulatedOtherComprehensiveIncomeLossRollForward" xlink:label="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E473DC321FB541B758615A527DB94C9A" xlink:to="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_7D9C87709C9D693A14775A527DB9BBE2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:to="loc_us-gaap_StockholdersEquity_7D9C87709C9D693A14775A527DB9BBE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_6E4479652360B3C616AF5A527DBA735B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_6E4479652360B3C616AF5A527DBA735B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_E5150CB09DB86728A3815A527DBA6B5E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_E5150CB09DB86728A3815A527DBA6B5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_74DB1C40745A616AE3BF5A527DBAAC9B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_74DB1C40745A616AE3BF5A527DBAAC9B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_542C8A2690D802A30D145A527DBABE27" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_542C8A2690D802A30D145A527DBABE27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_6790D2973D2069AF8CE75A527DBA70BE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_6790D2973D2069AF8CE75A527DBA70BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_3F27E14CFB216E8BEE705A527DBB0749" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_3F27E14CFB216E8BEE705A527DBB0749" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DB7CFDDC7A9F3DC6400F5A527DBBC9BC" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_livn_AccumulatedOtherComprehensiveIncomeLossRollForward_E7E2478DF8EA7F9FB6905A527DB99A44" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DB7CFDDC7A9F3DC6400F5A527DBBC9BC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/StockholdersEquityStatementOfStockholdersEquityDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:label="loc_us-gaap_ClassOfStockLineItems_45EDBF003DD9B88F9BCC69FC5BF736C5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_62498BFFD8B63E1E857969FC5BF4CB39" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_45EDBF003DD9B88F9BCC69FC5BF736C5" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_62498BFFD8B63E1E857969FC5BF4CB39" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_59269B7637CA67FFCA5B69FC5BF5AC7F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_62498BFFD8B63E1E857969FC5BF4CB39" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_59269B7637CA67FFCA5B69FC5BF5AC7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_F0D256CA592F57D63E2669FC5BF5D30C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_59269B7637CA67FFCA5B69FC5BF5AC7F" xlink:to="loc_us-gaap_TypeOfAdoptionMember_F0D256CA592F57D63E2669FC5BF5D30C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_F0D256CA592F57D63E2669FC5BF5D30C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_59269B7637CA67FFCA5B69FC5BF5AC7F" xlink:to="loc_us-gaap_TypeOfAdoptionMember_F0D256CA592F57D63E2669FC5BF5D30C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201616Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201616Member_7E7FE63B500D8882506369FC5BF5331B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_F0D256CA592F57D63E2669FC5BF5D30C" xlink:to="loc_us-gaap_AccountingStandardsUpdate201616Member_7E7FE63B500D8882506369FC5BF5331B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_AB0B2A765DBA1D0A08B269FC5BF5E124" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_62498BFFD8B63E1E857969FC5BF4CB39" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_AB0B2A765DBA1D0A08B269FC5BF5E124" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_B04019CAF1EFE921351069FC5BF5567B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_AB0B2A765DBA1D0A08B269FC5BF5E124" xlink:to="loc_us-gaap_EquityComponentDomain_B04019CAF1EFE921351069FC5BF5567B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_B04019CAF1EFE921351069FC5BF5567B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_AB0B2A765DBA1D0A08B269FC5BF5E124" xlink:to="loc_us-gaap_EquityComponentDomain_B04019CAF1EFE921351069FC5BF5567B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_6FE56A669A3B8368204A69FC5BF626FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_B04019CAF1EFE921351069FC5BF5567B" xlink:to="loc_us-gaap_CommonStockMember_6FE56A669A3B8368204A69FC5BF626FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_D53389E4628B333D09D269FC5BF6A10C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_B04019CAF1EFE921351069FC5BF5567B" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_D53389E4628B333D09D269FC5BF6A10C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_853DB423DCE7CC4C1FE069FC5BF64093" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_B04019CAF1EFE921351069FC5BF5567B" xlink:to="loc_us-gaap_TreasuryStockMember_853DB423DCE7CC4C1FE069FC5BF64093" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_A36AC6F6E322541629C869FC5BF6F896" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_B04019CAF1EFE921351069FC5BF5567B" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_A36AC6F6E322541629C869FC5BF6F896" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_E06673BAAD600556B99B69FC5BF7E9E2" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_B04019CAF1EFE921351069FC5BF5567B" xlink:to="loc_us-gaap_RetainedEarningsMember_E06673BAAD600556B99B69FC5BF7E9E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_45EDBF003DD9B88F9BCC69FC5BF736C5" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_4AE3F75A4DA71C18C4E069FC5BF73A1F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:to="loc_us-gaap_CommonStockSharesIssued_4AE3F75A4DA71C18C4E069FC5BF73A1F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_B0D0A555358829AB815B69FC5BF71B25" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:to="loc_us-gaap_StockholdersEquity_B0D0A555358829AB815B69FC5BF71B25" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_4955EAA9BCB51EF164F769FC5BF8BA8D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_4955EAA9BCB51EF164F769FC5BF8BA8D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_F4029D88F6DC9344F89369FC5BF8749F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_F4029D88F6DC9344F89369FC5BF8749F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_6054EB426084DC20740D69FC5BF8FDE3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_6054EB426084DC20740D69FC5BF8FDE3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_BAC3DA08720B94CC968C69FC5BFD5C03" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_BAC3DA08720B94CC968C69FC5BFD5C03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_B17A435C0C9662B6091569FC5BFDBA3A" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_B17A435C0C9662B6091569FC5BFDBA3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_309B126811A505DB6F9A69FC5BFED4A1" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:to="loc_us-gaap_NetIncomeLoss_309B126811A505DB6F9A69FC5BFED4A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_0DA477C91B8405DB326A69FEC9448031" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_198C7D68CE35E0C94AC869FC5BF7F270" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_0DA477C91B8405DB326A69FEC9448031" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/StockholdersEquityTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/SupplementalFinancialInformation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/SupplementalFinancialInformationSummaryOfAccruedLiabilitiesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/SupplementalFinancialInformationSummaryOfInventoryDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/SupplementalFinancialInformationTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/UnauditedCondensedConsolidatedFinancialStatements" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/UnauditedCondensedConsolidatedFinancialStatementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="loc_us-gaap_ShortTermDebtLineItems_EB28798225E579E5D27E69FC5D625843" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_049DFE57889FA28A609F69FC5D5EA767" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_EB28798225E579E5D27E69FC5D625843" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_049DFE57889FA28A609F69FC5D5EA767" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis" xlink:label="loc_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis_3320E2DF804A2CC9029E69FC5D5FDC31" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_049DFE57889FA28A609F69FC5D5EA767" xlink:to="loc_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis_3320E2DF804A2CC9029E69FC5D5FDC31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NatureOfErrorDomain" xlink:label="loc_us-gaap_NatureOfErrorDomain_4C95F5C589472C1EA53969FC5D5F2833_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis_3320E2DF804A2CC9029E69FC5D5FDC31" xlink:to="loc_us-gaap_NatureOfErrorDomain_4C95F5C589472C1EA53969FC5D5F2833_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NatureOfErrorDomain" xlink:label="loc_us-gaap_NatureOfErrorDomain_4C95F5C589472C1EA53969FC5D5F2833" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis_3320E2DF804A2CC9029E69FC5D5FDC31" xlink:to="loc_us-gaap_NatureOfErrorDomain_4C95F5C589472C1EA53969FC5D5F2833" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_IncorrectlyExcludedFromCostOfSalesMember" xlink:label="loc_livn_IncorrectlyExcludedFromCostOfSalesMember_EDE0340F0C7B74FFE15D69FC5D5F00A7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NatureOfErrorDomain_4C95F5C589472C1EA53969FC5D5F2833" xlink:to="loc_livn_IncorrectlyExcludedFromCostOfSalesMember_EDE0340F0C7B74FFE15D69FC5D5F00A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_19137197CF5BD610AB3C69FC5D6097E9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_049DFE57889FA28A609F69FC5D5EA767" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_19137197CF5BD610AB3C69FC5D6097E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_884B5A977E5243ECA80769FC5D60741A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_19137197CF5BD610AB3C69FC5D6097E9" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_884B5A977E5243ECA80769FC5D60741A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_884B5A977E5243ECA80769FC5D60741A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_19137197CF5BD610AB3C69FC5D6097E9" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_884B5A977E5243ECA80769FC5D60741A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_B90C0B61E1D90953AA7E69FC5D604EB5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_884B5A977E5243ECA80769FC5D60741A" xlink:to="loc_us-gaap_CostOfSalesMember_B90C0B61E1D90953AA7E69FC5D604EB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_70F4CB81415BCE2FE05469FC5D6065E4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_049DFE57889FA28A609F69FC5D5EA767" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_70F4CB81415BCE2FE05469FC5D6065E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_FAE2504D2737479E7FEA69FC5D608023_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_70F4CB81415BCE2FE05469FC5D6065E4" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_FAE2504D2737479E7FEA69FC5D608023_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_FAE2504D2737479E7FEA69FC5D608023" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_70F4CB81415BCE2FE05469FC5D6065E4" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_FAE2504D2737479E7FEA69FC5D608023" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_A8011D57F972C95E35F769FC5D616431" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_FAE2504D2737479E7FEA69FC5D608023" xlink:to="loc_us-gaap_LetterOfCreditMember_A8011D57F972C95E35F769FC5D616431" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_34316FFAFCFE3976A5CC69FC5D614E5D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_049DFE57889FA28A609F69FC5D5EA767" xlink:to="loc_us-gaap_StatementScenarioAxis_34316FFAFCFE3976A5CC69FC5D614E5D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_D9B7937945AE27492F6069FC5D619913_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_34316FFAFCFE3976A5CC69FC5D614E5D" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_D9B7937945AE27492F6069FC5D619913_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_D9B7937945AE27492F6069FC5D619913" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_34316FFAFCFE3976A5CC69FC5D614E5D" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_D9B7937945AE27492F6069FC5D619913" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_4DFF0E719D2C0C65A9C369FC5D618FEA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_D9B7937945AE27492F6069FC5D619913" xlink:to="loc_us-gaap_ScenarioForecastMember_4DFF0E719D2C0C65A9C369FC5D618FEA" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_LitigationProvisionLiabilityNet" xlink:label="loc_livn_LitigationProvisionLiabilityNet_CE2414E87C5295C6D2C069FC5D62D427" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_EB28798225E579E5D27E69FC5D625843" xlink:to="loc_livn_LitigationProvisionLiabilityNet_CE2414E87C5295C6D2C069FC5D62D427" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_ED6F780DB5F34B799A9769FD846AF53D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_EB28798225E579E5D27E69FC5D625843" xlink:to="loc_us-gaap_LongTermDebtCurrent_ED6F780DB5F34B799A9769FD846AF53D" xlink:type="arc" />
    <link:loc xlink:href="livn-20190331.xsd#livn_LitigationProvisionPayment" xlink:label="loc_livn_LitigationProvisionPayment_0B119A565BA8FF2E26D369FC5D62165E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_EB28798225E579E5D27E69FC5D625843" xlink:to="loc_livn_LitigationProvisionPayment_0B119A565BA8FF2E26D369FC5D62165E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_F0A93A4EC8CC5397C89769FC5D628488" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_EB28798225E579E5D27E69FC5D625843" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_F0A93A4EC8CC5397C89769FC5D628488" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_9EA6FB4940E7B1BEB40769FC5D63D24E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_EB28798225E579E5D27E69FC5D625843" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_9EA6FB4940E7B1BEB40769FC5D63D24E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.livanova.cyberonics.com/role/UnauditedCondensedConsolidatedFinancialStatementsPolicies" xlink:type="extended" />
</link:linkbase>
