


<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2020 Workiva-->
<!--r:8915bc97-8cb2-4f0c-96a2-c883aa4ea9b9,g:d08d1734-2e0e-46fe-92c1-d611937af057-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="lfvn-20191231.xsd#DocumentandEntityInformation"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/DocumentandEntityInformation" xlink:type="extended" id="i30358479eb8349ea9aed77488e6126d2_a11e9273-508a-42ae-9711-5d28f082a69f"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="lfvn-20191231.xsd#CondensedConsolidatedBalanceSheetsUnaudited"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="extended" id="i83720188767147d09be3ecbf26bb8d33_f4ab6902-bd37-49f6-bd27-7b4a49461db2"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="simple" xlink:href="lfvn-20191231.xsd#CondensedConsolidatedBalanceSheetsUnauditedParenthetical"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="extended" id="i5800a80baffe4d2f9fa6f997d84db397_9246e459-c061-48f3-bbda-fff99df99b85"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited" xlink:type="simple" xlink:href="lfvn-20191231.xsd#CondensedConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited" xlink:type="extended" id="idb407009e18f44e5b67ebad6fd0d939a_26e6b2c0-eb9d-4ebc-885f-e52e64691ce7"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/CondensedConsolidatedStatementofStockholdersEquityUnaudited" xlink:type="simple" xlink:href="lfvn-20191231.xsd#CondensedConsolidatedStatementofStockholdersEquityUnaudited"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/CondensedConsolidatedStatementofStockholdersEquityUnaudited" xlink:type="extended" id="i7a2f909487884e9fadefb5c69f2f3664_435f4080-0576-474b-af86-939b133df596">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_2990c165-339b-4612-871c-a43feee885bd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2990c165-339b-4612-871c-a43feee885bd" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_0fb4caaa-37a3-45b9-8c77-0c4019a18d25" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_SharesOutstanding_0fb4caaa-37a3-45b9-8c77-0c4019a18d25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_c27d8fa8-9b91-478e-bf46-4e8ddc3999e8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_StockholdersEquity_c27d8fa8-9b91-478e-bf46-4e8ddc3999e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_8d498050-7393-464d-800f-f6d8da847547" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_8d498050-7393-464d-800f-f6d8da847547" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_StockholdersEquityAttributabletoParentAdjustedBalance_a36ca862-c0d7-47e9-82e9-a823991c0b9a" xlink:href="lfvn-20191231.xsd#lfvn_StockholdersEquityAttributabletoParentAdjustedBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_lfvn_StockholdersEquityAttributabletoParentAdjustedBalance_a36ca862-c0d7-47e9-82e9-a823991c0b9a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_29609a16-1e86-491e-88b5-e42cc2efd063" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_29609a16-1e86-491e-88b5-e42cc2efd063" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_91987a92-ce34-4983-9205-53c743e11f62" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_91987a92-ce34-4983-9205-53c743e11f62" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_bdd1e982-6268-4df6-921a-34fb5d1215dd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_bdd1e982-6268-4df6-921a-34fb5d1215dd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_7a205845-c339-4244-813e-e289e5e308e1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_7a205845-c339-4244-813e-e289e5e308e1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_230c3763-ce17-4d88-9880-2e017a0a018c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_230c3763-ce17-4d88-9880-2e017a0a018c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_7dd4c771-ab99-4f38-bbb8-faf0768c1375" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_7dd4c771-ab99-4f38-bbb8-faf0768c1375" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_4f4752e5-de91-4e09-b456-91937e25f566" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_4f4752e5-de91-4e09-b456-91937e25f566" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_cbffb6a0-db9b-4dce-b7d3-d93dfe2dd948" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_cbffb6a0-db9b-4dce-b7d3-d93dfe2dd948" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_e9d13af6-2da7-4dbb-8f52-ac09565f5600" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_e9d13af6-2da7-4dbb-8f52-ac09565f5600" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_403a0ffa-866b-483d-89c2-fe05f7bdbf72" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_403a0ffa-866b-483d-89c2-fe05f7bdbf72" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_8d63b926-8a87-408f-9349-101fb515f124" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_8d63b926-8a87-408f-9349-101fb515f124" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_f3c682bb-4a6a-401d-9add-835b77c7314a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_f3c682bb-4a6a-401d-9add-835b77c7314a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_62422e9b-f2a8-4763-9988-42ff2ea41529" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bf12a70a-3f4c-469d-854a-771efd098894" xlink:to="loc_us-gaap_NetIncomeLoss_62422e9b-f2a8-4763-9988-42ff2ea41529" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_77b477cc-4e7a-45da-9052-efc278374757" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_38001376-2055-4949-bb9a-237b30b34cd0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_824cfd42-e16f-42d4-8a15-aa8d3f520c62" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_2990c165-339b-4612-871c-a43feee885bd" xlink:to="loc_us-gaap_StatementTable_824cfd42-e16f-42d4-8a15-aa8d3f520c62" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_1fca9a3d-99cf-4f2f-b79d-e061c6da9585" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_824cfd42-e16f-42d4-8a15-aa8d3f520c62" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_1fca9a3d-99cf-4f2f-b79d-e061c6da9585" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_1fca9a3d-99cf-4f2f-b79d-e061c6da9585_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1fca9a3d-99cf-4f2f-b79d-e061c6da9585" xlink:to="loc_us-gaap_EquityComponentDomain_1fca9a3d-99cf-4f2f-b79d-e061c6da9585_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_303ee8be-b18d-4b1f-9a7e-af1b21eeeb2b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1fca9a3d-99cf-4f2f-b79d-e061c6da9585" xlink:to="loc_us-gaap_EquityComponentDomain_303ee8be-b18d-4b1f-9a7e-af1b21eeeb2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_0c60224c-0cb0-486b-bfd4-e04616dd2537" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_303ee8be-b18d-4b1f-9a7e-af1b21eeeb2b" xlink:to="loc_us-gaap_CommonStockMember_0c60224c-0cb0-486b-bfd4-e04616dd2537" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_eae6f1a5-4fc6-49dd-9b8d-7a989a3b5cc3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_303ee8be-b18d-4b1f-9a7e-af1b21eeeb2b" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_eae6f1a5-4fc6-49dd-9b8d-7a989a3b5cc3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_b8d80649-7275-4608-9ecf-7b5f73cd8a79" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_303ee8be-b18d-4b1f-9a7e-af1b21eeeb2b" xlink:to="loc_us-gaap_RetainedEarningsMember_b8d80649-7275-4608-9ecf-7b5f73cd8a79" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_3acd4dd6-1ac2-425b-8708-3340106c582c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_303ee8be-b18d-4b1f-9a7e-af1b21eeeb2b" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_3acd4dd6-1ac2-425b-8708-3340106c582c" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lifevantage.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="lfvn-20191231.xsd#CondensedConsolidatedStatementsofCashFlowsUnaudited"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended" id="i92aa4bdc8408479c94ad058a794d7fe6_34998c0f-c7f1-4302-a1e3-87fa69f273d1"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/OrganizationandBasisofPresentation" xlink:type="simple" xlink:href="lfvn-20191231.xsd#OrganizationandBasisofPresentation"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/OrganizationandBasisofPresentation" xlink:type="extended" id="id7c99f077e9844579dd5326aae05cc13_7cf3922f-1252-4138-9404-d527921ee2eb"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/OrganizationandBasisofPresentationDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#OrganizationandBasisofPresentationDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/OrganizationandBasisofPresentationDetails" xlink:type="extended" id="ie03e318f82544f318467424303c357f9_528abc45-f862-46b5-8f4e-00674b49b9bf"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/SummaryofSignificantAccountingPolicies" xlink:type="simple" xlink:href="lfvn-20191231.xsd#SummaryofSignificantAccountingPolicies"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/SummaryofSignificantAccountingPolicies" xlink:type="extended" id="if4fbfe1c02e943da8205cd948e6dad04_0b0e9376-8935-4e78-9e3f-ed2f1c6197c1"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="lfvn-20191231.xsd#SummaryofSignificantAccountingPoliciesPolicies"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesPolicies" xlink:type="extended" id="idac1a6c95e70422bb141b93b3730770e_9e3a8a37-40c9-4779-9217-a9dc157e6686"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesTables" xlink:type="simple" xlink:href="lfvn-20191231.xsd#SummaryofSignificantAccountingPoliciesTables"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesTables" xlink:type="extended" id="i64ab3a0940d247d78a7f9b4ec432f2a2_9c131ac6-32bb-4aa1-9cde-aa55647cd82a"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#SummaryofSignificantAccountingPoliciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended" id="icf5891fddbb34bfc88ca09bcaa63bc24_76b2b0c2-8f33-4d50-abdb-8825179bc62e">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized_523252ec-2879-4a77-9c08-71088137945d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized_523252ec-2879-4a77-9c08-71088137945d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_60607c12-dc93-4584-befc-8cd67414d67d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_60607c12-dc93-4584-befc-8cd67414d67d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_abe1b26c-294d-4af8-9e21-4bb4c2c47c97" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_abe1b26c-294d-4af8-9e21-4bb4c2c47c97" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_870cb5e1-3c60-4f20-b65a-3309379e308a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_870cb5e1-3c60-4f20-b65a-3309379e308a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryValuationReserves_aac356b9-0e9d-414a-8960-986b7fa39222" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryValuationReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_InventoryValuationReserves_aac356b9-0e9d-414a-8960-986b7fa39222" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_NotesReceivableRelatedPartyMaximumCommitment_afbe9905-e809-42ed-9bfe-f21f987eaf18" xlink:href="lfvn-20191231.xsd#lfvn_NotesReceivableRelatedPartyMaximumCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_lfvn_NotesReceivableRelatedPartyMaximumCommitment_afbe9905-e809-42ed-9bfe-f21f987eaf18" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_MoneyBackGuaranteePeriod_98cf13b6-f6dc-42be-9128-a4e93220067e" xlink:href="lfvn-20191231.xsd#lfvn_MoneyBackGuaranteePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_lfvn_MoneyBackGuaranteePeriod_98cf13b6-f6dc-42be-9128-a4e93220067e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerRefundLiability_95e8c33e-5e29-408d-bc19-00bde0f7db97" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerRefundLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_ContractWithCustomerRefundLiability_95e8c33e-5e29-408d-bc19-00bde0f7db97" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_3cff544b-8b3e-44cc-985a-5b76999b524b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_3cff544b-8b3e-44cc-985a-5b76999b524b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_834305fa-8ff5-4d80-87c7-14612ba09afc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_834305fa-8ff5-4d80-87c7-14612ba09afc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_0e9c0a2e-4cf0-4038-90c3-8bf80f69e40c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_0e9c0a2e-4cf0-4038-90c3-8bf80f69e40c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_6d76bf5c-4847-4b42-9242-5ccd6406a3f0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_NumberOfOperatingSegments_6d76bf5c-4847-4b42-9242-5ccd6406a3f0" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_NumberOfGeographicSegments_0e717ed1-190e-47b0-bcef-de7deb0d98ed" xlink:href="lfvn-20191231.xsd#lfvn_NumberOfGeographicSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_lfvn_NumberOfGeographicSegments_0e717ed1-190e-47b0-bcef-de7deb0d98ed" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_41b694f7-4381-4f8e-b534-9f7515e9a0a4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_OperatingLeaseLiability_41b694f7-4381-4f8e-b534-9f7515e9a0a4" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_f6d9d1cb-e6ab-4272-8ddf-e7f973ba6e8b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_f6d9d1cb-e6ab-4272-8ddf-e7f973ba6e8b" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_cf7f0c1c-cfde-4212-b2ed-f0cd02a1d3bd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_cf7f0c1c-cfde-4212-b2ed-f0cd02a1d3bd" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_75ae4cad-ac9e-4636-b5e0-3258cd7d3dc5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ac4e74cd-94b1-400f-9356-4199b288553a" xlink:to="loc_us-gaap_ConcentrationRiskTable_75ae4cad-ac9e-4636-b5e0-3258cd7d3dc5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_cc70025d-1bad-473f-9839-25b3ae5baaec" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_75ae4cad-ac9e-4636-b5e0-3258cd7d3dc5" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_cc70025d-1bad-473f-9839-25b3ae5baaec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_cc70025d-1bad-473f-9839-25b3ae5baaec_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_cc70025d-1bad-473f-9839-25b3ae5baaec" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_cc70025d-1bad-473f-9839-25b3ae5baaec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_59d71645-34a2-4f46-974f-10541f35d622" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_cc70025d-1bad-473f-9839-25b3ae5baaec" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_59d71645-34a2-4f46-974f-10541f35d622" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_CashAccountsHeldPrimarilyAtFinancialInstitutionMember_3d70e2aa-4e56-45d5-9d1a-e8c7333d09e6" xlink:href="lfvn-20191231.xsd#lfvn_CashAccountsHeldPrimarilyAtFinancialInstitutionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_59d71645-34a2-4f46-974f-10541f35d622" xlink:to="loc_lfvn_CashAccountsHeldPrimarilyAtFinancialInstitutionMember_3d70e2aa-4e56-45d5-9d1a-e8c7333d09e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_CashAccountsHeldatOtherFinancialInstitutionsMember_96a92273-7e6a-49a1-ab5c-27cf9854e106" xlink:href="lfvn-20191231.xsd#lfvn_CashAccountsHeldatOtherFinancialInstitutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_59d71645-34a2-4f46-974f-10541f35d622" xlink:to="loc_lfvn_CashAccountsHeldatOtherFinancialInstitutionsMember_96a92273-7e6a-49a1-ab5c-27cf9854e106" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesComponentsofInventoryDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#SummaryofSignificantAccountingPoliciesComponentsofInventoryDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesComponentsofInventoryDetails" xlink:type="extended" id="i8ca993d51d57424a9033d78e19791690_e7ae8e5e-2dc8-43fb-91e2-0686b9ccf494"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesSummaryofComputationofNetIncomePerShareDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#SummaryofSignificantAccountingPoliciesSummaryofComputationofNetIncomePerShareDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesSummaryofComputationofNetIncomePerShareDetails" xlink:type="extended" id="i4bd9bbe8617f4a82a7572f71506193c3_c6f35aef-7962-4918-9ac9-0b26d4865bb3"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesSegmentInformationDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#SummaryofSignificantAccountingPoliciesSegmentInformationDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/SummaryofSignificantAccountingPoliciesSegmentInformationDetails" xlink:type="extended" id="i046df352c83746898cd00b0faf90334d_5d43f140-7cb4-4aab-98e6-177dcfd8f0e3">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_bce3e758-d9a2-4fda-90bc-990b19a03f93" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a170c0f5-91c1-4d16-9e9e-f77a6ca91d80" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_bce3e758-d9a2-4fda-90bc-990b19a03f93" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a170c0f5-91c1-4d16-9e9e-f77a6ca91d80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_b54f9986-8a8d-4e54-9d4a-410f1743c4db" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_bce3e758-d9a2-4fda-90bc-990b19a03f93" xlink:to="loc_us-gaap_NoncurrentAssets_b54f9986-8a8d-4e54-9d4a-410f1743c4db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_1fb9ced9-0c06-4bbc-88da-c176c188eb10" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_bce3e758-d9a2-4fda-90bc-990b19a03f93" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_1fb9ced9-0c06-4bbc-88da-c176c188eb10" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_fb9dc9a4-95ac-4e65-9b73-1bfdc63f5ad6" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_1fb9ced9-0c06-4bbc-88da-c176c188eb10" xlink:to="loc_srt_StatementGeographicalAxis_fb9dc9a4-95ac-4e65-9b73-1bfdc63f5ad6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_fb9dc9a4-95ac-4e65-9b73-1bfdc63f5ad6_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_fb9dc9a4-95ac-4e65-9b73-1bfdc63f5ad6" xlink:to="loc_srt_SegmentGeographicalDomain_fb9dc9a4-95ac-4e65-9b73-1bfdc63f5ad6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_da6764dd-d889-4e67-80ac-dc6c55c6b021" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_fb9dc9a4-95ac-4e65-9b73-1bfdc63f5ad6" xlink:to="loc_srt_SegmentGeographicalDomain_da6764dd-d889-4e67-80ac-dc6c55c6b021" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AmericasMember_c641a67f-a3b9-465e-83be-e7435d3d6d42" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AmericasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_da6764dd-d889-4e67-80ac-dc6c55c6b021" xlink:to="loc_srt_AmericasMember_c641a67f-a3b9-465e-83be-e7435d3d6d42" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_AsiaPacificAndEuropeMember_22150c9d-a039-429f-b90f-89e7929936a3" xlink:href="lfvn-20191231.xsd#lfvn_AsiaPacificAndEuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_da6764dd-d889-4e67-80ac-dc6c55c6b021" xlink:to="loc_lfvn_AsiaPacificAndEuropeMember_22150c9d-a039-429f-b90f-89e7929936a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_235d7cc8-e8f1-48bd-b90a-3041d2a9fe36" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_da6764dd-d889-4e67-80ac-dc6c55c6b021" xlink:to="loc_country_US_235d7cc8-e8f1-48bd-b90a-3041d2a9fe36" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_JP_261b1daa-edb1-411d-be63-63505e1d9a42" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_JP"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_da6764dd-d889-4e67-80ac-dc6c55c6b021" xlink:to="loc_country_JP_261b1daa-edb1-411d-be63-63505e1d9a42" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lifevantage.com/role/GigEconomyGroupInvestment" xlink:type="simple" xlink:href="lfvn-20191231.xsd#GigEconomyGroupInvestment"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/GigEconomyGroupInvestment" xlink:type="extended" id="i0c241e2392a347779a245282e693ed1a_19994a94-2bf9-4e8e-a228-09e8813bd140"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/GigEconomyGroupInvestmentDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#GigEconomyGroupInvestmentDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/GigEconomyGroupInvestmentDetails" xlink:type="extended" id="i50483fc779f14e4799400f25da79e9c0_716498f3-579e-4f80-9910-630a54beee40">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_22e7cf9c-114d-4e6b-99f4-75932ef07f59" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_NotesReceivableRelatedPartyMaximumCommitment_41b66ec3-9ac2-4dba-8398-4fffa80ca009" xlink:href="lfvn-20191231.xsd#lfvn_NotesReceivableRelatedPartyMaximumCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_22e7cf9c-114d-4e6b-99f4-75932ef07f59" xlink:to="loc_lfvn_NotesReceivableRelatedPartyMaximumCommitment_41b66ec3-9ac2-4dba-8398-4fffa80ca009" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionOriginalDebtInterestRateOfDebt_d61f6c8d-9066-4318-b92f-9c972460eb70" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtConversionOriginalDebtInterestRateOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_22e7cf9c-114d-4e6b-99f4-75932ef07f59" xlink:to="loc_us-gaap_DebtConversionOriginalDebtInterestRateOfDebt_d61f6c8d-9066-4318-b92f-9c972460eb70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_580ce135-f182-4017-8c10-8a87da381c7f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtConversionConvertedInstrumentSharesIssued1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_22e7cf9c-114d-4e6b-99f4-75932ef07f59" xlink:to="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_580ce135-f182-4017-8c10-8a87da381c7f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionConvertedInstrumentAmount1_4f13f90d-a259-4d65-8117-cdbaeb42ee26" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtConversionConvertedInstrumentAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_22e7cf9c-114d-4e6b-99f4-75932ef07f59" xlink:to="loc_us-gaap_DebtConversionConvertedInstrumentAmount1_4f13f90d-a259-4d65-8117-cdbaeb42ee26" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_981c2e4e-e88c-4640-b104-f1be1dfee843" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_22e7cf9c-114d-4e6b-99f4-75932ef07f59" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_981c2e4e-e88c-4640-b104-f1be1dfee843" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_78233497-40e6-4073-958d-368bb292bc83" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_981c2e4e-e88c-4640-b104-f1be1dfee843" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_78233497-40e6-4073-958d-368bb292bc83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_78233497-40e6-4073-958d-368bb292bc83_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_78233497-40e6-4073-958d-368bb292bc83" xlink:to="loc_us-gaap_RelatedPartyDomain_78233497-40e6-4073-958d-368bb292bc83_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_863486d2-b1f7-4be6-b458-a7b6423056a6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_78233497-40e6-4073-958d-368bb292bc83" xlink:to="loc_us-gaap_RelatedPartyDomain_863486d2-b1f7-4be6-b458-a7b6423056a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_87260121-e3e6-46bf-b880-bbbf617a9e19" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_863486d2-b1f7-4be6-b458-a7b6423056a6" xlink:to="loc_srt_AffiliatedEntityMember_87260121-e3e6-46bf-b880-bbbf617a9e19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_d28f255b-b2cd-434c-b782-8068ae1fd71f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_981c2e4e-e88c-4640-b104-f1be1dfee843" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_d28f255b-b2cd-434c-b782-8068ae1fd71f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_d28f255b-b2cd-434c-b782-8068ae1fd71f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_d28f255b-b2cd-434c-b782-8068ae1fd71f" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_d28f255b-b2cd-434c-b782-8068ae1fd71f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_c0f6b8ec-da74-45fc-9870-3b23998ae1a8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_d28f255b-b2cd-434c-b782-8068ae1fd71f" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_c0f6b8ec-da74-45fc-9870-3b23998ae1a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_ea271278-e7bd-4b9f-8b17-3df1a1e6fc11" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_c0f6b8ec-da74-45fc-9870-3b23998ae1a8" xlink:to="loc_us-gaap_CommonStockMember_ea271278-e7bd-4b9f-8b17-3df1a1e6fc11" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lifevantage.com/role/Leases" xlink:type="simple" xlink:href="lfvn-20191231.xsd#Leases"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/Leases" xlink:type="extended" id="i52a3bfba1a564c529bf0e2771f97ad19_3846391a-b908-4594-abae-01a43bcd2e1f"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/LeasesTables" xlink:type="simple" xlink:href="lfvn-20191231.xsd#LeasesTables"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/LeasesTables" xlink:type="extended" id="i025c5a94ab5048e18cbfad5b23e0d185_5707bd82-892f-4f69-88c1-d81769b3f900"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#LeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/LeasesNarrativeDetails" xlink:type="extended" id="i7e8558c772b747e3bec929dd9d21c972_577d81dd-0e7d-424f-9b96-ac51209e3142">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_dd8e8887-90e8-49c5-b77b-f8146e6005ae" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_7e735d20-6f80-4d43-99f0-34c4628c3d7d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dd8e8887-90e8-49c5-b77b-f8146e6005ae" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_7e735d20-6f80-4d43-99f0-34c4628c3d7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_f21fc808-c31e-4e49-acd7-207da30a11e4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dd8e8887-90e8-49c5-b77b-f8146e6005ae" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_f21fc808-c31e-4e49-acd7-207da30a11e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_a18d8ebb-6c27-44c5-aa19-bbd6d5984370" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dd8e8887-90e8-49c5-b77b-f8146e6005ae" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_a18d8ebb-6c27-44c5-aa19-bbd6d5984370" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseExpense_1e83c779-1453-4728-a540-2eb2feafb45b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dd8e8887-90e8-49c5-b77b-f8146e6005ae" xlink:to="loc_us-gaap_OperatingLeaseExpense_1e83c779-1453-4728-a540-2eb2feafb45b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_8816926e-3cd9-4854-9467-def04fb791a7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dd8e8887-90e8-49c5-b77b-f8146e6005ae" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_8816926e-3cd9-4854-9467-def04fb791a7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a4abe79d-e534-412f-bc8a-16cfa8492d9b" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_8816926e-3cd9-4854-9467-def04fb791a7" xlink:to="loc_srt_RangeAxis_a4abe79d-e534-412f-bc8a-16cfa8492d9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a4abe79d-e534-412f-bc8a-16cfa8492d9b_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a4abe79d-e534-412f-bc8a-16cfa8492d9b" xlink:to="loc_srt_RangeMember_a4abe79d-e534-412f-bc8a-16cfa8492d9b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_da767759-b0ec-4b50-ad09-f87bf260b641" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a4abe79d-e534-412f-bc8a-16cfa8492d9b" xlink:to="loc_srt_RangeMember_da767759-b0ec-4b50-ad09-f87bf260b641" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_f27eecec-ce7c-43a9-b07c-f0144d48f383" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_da767759-b0ec-4b50-ad09-f87bf260b641" xlink:to="loc_srt_MinimumMember_f27eecec-ce7c-43a9-b07c-f0144d48f383" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_ef1a4fab-2c6e-4feb-901d-a81b9488a55e" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_da767759-b0ec-4b50-ad09-f87bf260b641" xlink:to="loc_srt_MaximumMember_ef1a4fab-2c6e-4feb-901d-a81b9488a55e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lifevantage.com/role/LeasesScheduleofsupplementalcashflowrelatedtooperatingleasesDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#LeasesScheduleofsupplementalcashflowrelatedtooperatingleasesDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/LeasesScheduleofsupplementalcashflowrelatedtooperatingleasesDetails" xlink:type="extended" id="i28764be135d447579b3e426ac56caebc_5a70fd0b-b3d7-445a-8921-c06b7a1a77cd"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/LeasesScheduleofmaturityofleaseliabilitiesDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#LeasesScheduleofmaturityofleaseliabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/LeasesScheduleofmaturityofleaseliabilitiesDetails" xlink:type="extended" id="i80d46e68757a41cfa83d9de5d1d777ab_8e35224a-9760-40ac-9c4d-b55d4a21f90d"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/LeasesScheduleofminimumfutureoperatingleaseobligationsDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#LeasesScheduleofminimumfutureoperatingleaseobligationsDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/LeasesScheduleofminimumfutureoperatingleaseobligationsDetails" xlink:type="extended" id="ic73575ec875643f98eab0c4418c10651_68b14178-7696-4892-8df3-4e8d0d82d1c4"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/LongTermDebt" xlink:type="simple" xlink:href="lfvn-20191231.xsd#LongTermDebt"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/LongTermDebt" xlink:type="extended" id="i4161a4c7c63346409a1881a0dc026869_1a8d8535-0b29-4aba-a814-5e05cc0fa6dd"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/LongTermDebtNarrativeDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#LongTermDebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/LongTermDebtNarrativeDetails" xlink:type="extended" id="i3ef24a23c5d547a282f6e0d230a2f802_eea0b44b-fc58-423d-860b-2b262a1f3316">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_26e5d7a1-74a1-44bd-87fd-d2f3d0e8cd68" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_26e5d7a1-74a1-44bd-87fd-d2f3d0e8cd68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_bb3a1ed7-609c-47a7-99d5-1058695fc609" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFrequencyOfPeriodicPayment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_bb3a1ed7-609c-47a7-99d5-1058695fc609" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_ffd8c82d-983c-46dd-bbbe-e879b67ecc1e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentPeriodicPaymentPrincipal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_ffd8c82d-983c-46dd-bbbe-e879b67ecc1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_a1b24317-fdbe-4e00-aa3e-c03812121f29" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtPercentageBearingFixedInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_a1b24317-fdbe-4e00-aa3e-c03812121f29" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_DebtInstrumentCovenantFixedChargeCoverageRatio_58044782-7f0f-4777-b53d-2e51482c5fff" xlink:href="lfvn-20191231.xsd#lfvn_DebtInstrumentCovenantFixedChargeCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_lfvn_DebtInstrumentCovenantFixedChargeCoverageRatio_58044782-7f0f-4777-b53d-2e51482c5fff" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_DebtInstrumentCovenantRequiredMinimumWorkingCapital_a04eab1c-a6b2-49dd-bd6b-4f09c5f0e732" xlink:href="lfvn-20191231.xsd#lfvn_DebtInstrumentCovenantRequiredMinimumWorkingCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_lfvn_DebtInstrumentCovenantRequiredMinimumWorkingCapital_a04eab1c-a6b2-49dd-bd6b-4f09c5f0e732" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_DebtInstrumentCovenantTotalLiabilitiesToTangibleNetWorthRatio_fa49a670-060b-4b2a-b239-440921538917" xlink:href="lfvn-20191231.xsd#lfvn_DebtInstrumentCovenantTotalLiabilitiesToTangibleNetWorthRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_lfvn_DebtInstrumentCovenantTotalLiabilitiesToTangibleNetWorthRatio_fa49a670-060b-4b2a-b239-440921538917" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_3c4be3d8-1f5b-4366-b1b0-a0cecc051fc6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_3c4be3d8-1f5b-4366-b1b0-a0cecc051fc6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_f26ef40b-80e3-4380-bf15-dd38738ab7f3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_f26ef40b-80e3-4380-bf15-dd38738ab7f3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_f61a5f81-a2b9-4224-b289-462384d94f43" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_4fc7e0e6-0e76-4d52-82d3-35f547189dde" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_f61a5f81-a2b9-4224-b289-462384d94f43" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_57ba0402-d31d-455e-b5b0-af2f2018944f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_f61a5f81-a2b9-4224-b289-462384d94f43" xlink:to="loc_us-gaap_DebtInstrumentAxis_57ba0402-d31d-455e-b5b0-af2f2018944f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_57ba0402-d31d-455e-b5b0-af2f2018944f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_57ba0402-d31d-455e-b5b0-af2f2018944f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_57ba0402-d31d-455e-b5b0-af2f2018944f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5157a1bc-70da-4181-b664-3e27c5e1e863" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_57ba0402-d31d-455e-b5b0-af2f2018944f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5157a1bc-70da-4181-b664-3e27c5e1e863" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_March2016TermLoanMember_22e5c8c0-c0a6-4fd8-bd96-327fb58df6d5" xlink:href="lfvn-20191231.xsd#lfvn_March2016TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5157a1bc-70da-4181-b664-3e27c5e1e863" xlink:to="loc_lfvn_March2016TermLoanMember_22e5c8c0-c0a6-4fd8-bd96-327fb58df6d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_March2016RevolvingLoanMember_882e00bd-2cbd-483e-a663-95845d983530" xlink:href="lfvn-20191231.xsd#lfvn_March2016RevolvingLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5157a1bc-70da-4181-b664-3e27c5e1e863" xlink:to="loc_lfvn_March2016RevolvingLoanMember_882e00bd-2cbd-483e-a663-95845d983530" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_5f0edd2c-2159-4434-bdbf-2cb95cfac3cd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_f61a5f81-a2b9-4224-b289-462384d94f43" xlink:to="loc_us-gaap_CreditFacilityAxis_5f0edd2c-2159-4434-bdbf-2cb95cfac3cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_5f0edd2c-2159-4434-bdbf-2cb95cfac3cd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_5f0edd2c-2159-4434-bdbf-2cb95cfac3cd" xlink:to="loc_us-gaap_CreditFacilityDomain_5f0edd2c-2159-4434-bdbf-2cb95cfac3cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_98c79878-cfc8-42be-92d9-97d84ead42ec" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_5f0edd2c-2159-4434-bdbf-2cb95cfac3cd" xlink:to="loc_us-gaap_CreditFacilityDomain_98c79878-cfc8-42be-92d9-97d84ead42ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_c017fac5-4e20-4c07-b71d-6c8e4fbb86f3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_98c79878-cfc8-42be-92d9-97d84ead42ec" xlink:to="loc_us-gaap_SecuredDebtMember_c017fac5-4e20-4c07-b71d-6c8e4fbb86f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_f80cfec5-fd64-48a9-8af0-846da150cfba" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_98c79878-cfc8-42be-92d9-97d84ead42ec" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_f80cfec5-fd64-48a9-8af0-846da150cfba" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lifevantage.com/role/StockholdersEquity" xlink:type="simple" xlink:href="lfvn-20191231.xsd#StockholdersEquity"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/StockholdersEquity" xlink:type="extended" id="ic2d5e43ed6d44eeba98f6dfb79342351_a74c578d-25a1-42fe-9d18-a855f9b6a942"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/StockholdersEquityDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#StockholdersEquityDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/StockholdersEquityDetails" xlink:type="extended" id="if38496d9da1b49d88eb25af3f4805345_c3c1f1b4-cce3-4b9c-a741-12919f3aaa9f">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_c2683ddd-e7f2-4bfb-bcb1-44de8c517626" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_e99e23b3-b781-4bec-972b-c17b7c0f0521" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_c2683ddd-e7f2-4bfb-bcb1-44de8c517626" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_e99e23b3-b781-4bec-972b-c17b7c0f0521" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_d8bf934a-6fcd-4a66-8a2e-8eba50013eec" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_c2683ddd-e7f2-4bfb-bcb1-44de8c517626" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_d8bf934a-6fcd-4a66-8a2e-8eba50013eec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_4eb5b82a-d0aa-4fac-8731-a1a9a7233be5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_c2683ddd-e7f2-4bfb-bcb1-44de8c517626" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_4eb5b82a-d0aa-4fac-8731-a1a9a7233be5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_e311e3fc-bf11-4ebc-ae65-f81d38bdae00" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_c2683ddd-e7f2-4bfb-bcb1-44de8c517626" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_e311e3fc-bf11-4ebc-ae65-f81d38bdae00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_7bcccaaa-83cb-4a59-9d48-1e83530f5990" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_c2683ddd-e7f2-4bfb-bcb1-44de8c517626" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_7bcccaaa-83cb-4a59-9d48-1e83530f5990" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_ccb48486-5cc2-4251-ada3-4fa9f7cd907e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_c2683ddd-e7f2-4bfb-bcb1-44de8c517626" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_ccb48486-5cc2-4251-ada3-4fa9f7cd907e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_5b486625-2a90-4c1f-ab0d-e9b6b860cedf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_c2683ddd-e7f2-4bfb-bcb1-44de8c517626" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_5b486625-2a90-4c1f-ab0d-e9b6b860cedf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_e849942f-9712-405f-ad7d-48f46e4ea590" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_5b486625-2a90-4c1f-ab0d-e9b6b860cedf" xlink:to="loc_us-gaap_StatementClassOfStockAxis_e849942f-9712-405f-ad7d-48f46e4ea590" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_e849942f-9712-405f-ad7d-48f46e4ea590_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_e849942f-9712-405f-ad7d-48f46e4ea590" xlink:to="loc_us-gaap_ClassOfStockDomain_e849942f-9712-405f-ad7d-48f46e4ea590_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_c4b25cb5-7646-41a0-a238-5c912b62961e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_e849942f-9712-405f-ad7d-48f46e4ea590" xlink:to="loc_us-gaap_ClassOfStockDomain_c4b25cb5-7646-41a0-a238-5c912b62961e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_29cd762e-3175-4eaf-9a95-36e944f3ada6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_c4b25cb5-7646-41a0-a238-5c912b62961e" xlink:to="loc_us-gaap_CommonStockMember_29cd762e-3175-4eaf-9a95-36e944f3ada6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lifevantage.com/role/StockBasedCompensation" xlink:type="simple" xlink:href="lfvn-20191231.xsd#StockBasedCompensation"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/StockBasedCompensation" xlink:type="extended" id="ie9f951629c88410fa302df52bbd5ea8d_594e9eb9-7b88-4dd5-8b61-47e228325b58"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/StockBasedCompensationDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#StockBasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/StockBasedCompensationDetails" xlink:type="extended" id="ide6e4e27fd2941bfba92e6458928df99_956ba9c0-920c-4103-8fa9-6fb17d18d4f3">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_70a2b926-f9c7-46a8-bd15-544b9203d6d4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_70a2b926-f9c7-46a8-bd15-544b9203d6d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_5eb43956-b3a0-472d-a0cc-386ad5e054ba" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_5eb43956-b3a0-472d-a0cc-386ad5e054ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_1408d1f1-53ac-481d-85f6-76fe98cee36a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_1408d1f1-53ac-481d-85f6-76fe98cee36a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_febd22a9-4db4-4491-940a-88cfb6025d7b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_febd22a9-4db4-4491-940a-88cfb6025d7b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_73fd94ad-fbcb-4d7d-85c4-df7e1a6ecfb3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_73fd94ad-fbcb-4d7d-85c4-df7e1a6ecfb3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_4f57a1af-b90b-4112-bcfa-4e4bbc67ec0c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_4f57a1af-b90b-4112-bcfa-4e4bbc67ec0c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_245b9285-ed1a-4aef-918b-96dd8c6a8ce3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_245b9285-ed1a-4aef-918b-96dd8c6a8ce3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_a4b26308-4f2a-493e-bc38-b75a3df50a91" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_a4b26308-4f2a-493e-bc38-b75a3df50a91" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_3d28d4de-7db0-48b7-a04f-cdfbc537a197" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_3d28d4de-7db0-48b7-a04f-cdfbc537a197" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofVestingInstallments_4fb786df-7535-48ca-b82c-059750130436" xlink:href="lfvn-20191231.xsd#lfvn_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofVestingInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_lfvn_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofVestingInstallments_4fb786df-7535-48ca-b82c-059750130436" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_571e2f57-ea50-4536-8ba6-e1ff2e9f5d5e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_571e2f57-ea50-4536-8ba6-e1ff2e9f5d5e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_361f77e1-c638-49eb-8e4a-10496d192a9e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_361f77e1-c638-49eb-8e4a-10496d192a9e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_debfc8f9-1e03-4c74-b8bb-2769c738b48c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_debfc8f9-1e03-4c74-b8bb-2769c738b48c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_195d6dd0-d48b-4c54-9801-0cb39f8a960a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_195d6dd0-d48b-4c54-9801-0cb39f8a960a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee_d82f3216-d7a2-4840-8ffa-810b9f938e3c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee_d82f3216-d7a2-4840-8ffa-810b9f938e3c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountInExcessOfFairMarketValueOfStockForOptionNotToBeGranted_503df5d8-57b2-4ce8-b522-477ae73f1471" xlink:href="lfvn-20191231.xsd#lfvn_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountInExcessOfFairMarketValueOfStockForOptionNotToBeGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_lfvn_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountInExcessOfFairMarketValueOfStockForOptionNotToBeGranted_503df5d8-57b2-4ce8-b522-477ae73f1471" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_061312e8-6ff5-409e-a5ce-92263ba1b1f0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_061312e8-6ff5-409e-a5ce-92263ba1b1f0" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_f43dccda-6236-4a56-ab0d-bc9b27bd46de" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_f43dccda-6236-4a56-ab0d-bc9b27bd46de" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_SharebasedCompensationArrangementbySharebasedPaymentAwardIncreaseDecreaseofSharebasedLiabilities_ec60276c-f014-4b87-89e2-2876d4b21182" xlink:href="lfvn-20191231.xsd#lfvn_SharebasedCompensationArrangementbySharebasedPaymentAwardIncreaseDecreaseofSharebasedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_lfvn_SharebasedCompensationArrangementbySharebasedPaymentAwardIncreaseDecreaseofSharebasedLiabilities_ec60276c-f014-4b87-89e2-2876d4b21182" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fabe5a8a-e9fb-4ff4-93b4-e7c9120e9c7b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d191570-32c5-4097-a8ad-4054baff14e8" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fabe5a8a-e9fb-4ff4-93b4-e7c9120e9c7b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_3d0f4168-14c5-4323-8dcd-2027e308a728" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fabe5a8a-e9fb-4ff4-93b4-e7c9120e9c7b" xlink:to="loc_us-gaap_AwardTypeAxis_3d0f4168-14c5-4323-8dcd-2027e308a728" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3d0f4168-14c5-4323-8dcd-2027e308a728_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_3d0f4168-14c5-4323-8dcd-2027e308a728" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3d0f4168-14c5-4323-8dcd-2027e308a728_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a6322c07-4ba5-4bc2-ae62-3869658d8942" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_3d0f4168-14c5-4323-8dcd-2027e308a728" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a6322c07-4ba5-4bc2-ae62-3869658d8942" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_138ad007-8754-4bf8-b7d8-d4298e6a2c6c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a6322c07-4ba5-4bc2-ae62-3869658d8942" xlink:to="loc_us-gaap_PerformanceSharesMember_138ad007-8754-4bf8-b7d8-d4298e6a2c6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_63a31478-a523-4d84-858b-53ea8e8d4598" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fabe5a8a-e9fb-4ff4-93b4-e7c9120e9c7b" xlink:to="loc_us-gaap_PlanNameAxis_63a31478-a523-4d84-858b-53ea8e8d4598" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_63a31478-a523-4d84-858b-53ea8e8d4598_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_63a31478-a523-4d84-858b-53ea8e8d4598" xlink:to="loc_us-gaap_PlanNameDomain_63a31478-a523-4d84-858b-53ea8e8d4598_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_2521fc1f-b00b-4712-a334-0da1502cab94" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_63a31478-a523-4d84-858b-53ea8e8d4598" xlink:to="loc_us-gaap_PlanNameDomain_2521fc1f-b00b-4712-a334-0da1502cab94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_TwoThousandAndSevenLongTermIncentivePlanMember_458f308b-e007-4a20-8e0b-1968c53a51fd" xlink:href="lfvn-20191231.xsd#lfvn_TwoThousandAndSevenLongTermIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_2521fc1f-b00b-4712-a334-0da1502cab94" xlink:to="loc_lfvn_TwoThousandAndSevenLongTermIncentivePlanMember_458f308b-e007-4a20-8e0b-1968c53a51fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_TwoThousandAndTenLongTermIncentivePlanMember_a843335b-09fd-452e-b9e1-172cdde569c1" xlink:href="lfvn-20191231.xsd#lfvn_TwoThousandAndTenLongTermIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_2521fc1f-b00b-4712-a334-0da1502cab94" xlink:to="loc_lfvn_TwoThousandAndTenLongTermIncentivePlanMember_a843335b-09fd-452e-b9e1-172cdde569c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_TwoThousandSeventeenLongTermIncentivePlanMember_2df3b97e-3fcc-4da1-aa08-8615ffbe3b9a" xlink:href="lfvn-20191231.xsd#lfvn_TwoThousandSeventeenLongTermIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_2521fc1f-b00b-4712-a334-0da1502cab94" xlink:to="loc_lfvn_TwoThousandSeventeenLongTermIncentivePlanMember_2df3b97e-3fcc-4da1-aa08-8615ffbe3b9a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_TwoThousandSeventeenLongTermIncentivePlanExcludingTwoThousandAndTenLongTermIncentivePlanMember_baef2e3a-0fa4-4a84-8e69-76761f2a65f1" xlink:href="lfvn-20191231.xsd#lfvn_TwoThousandSeventeenLongTermIncentivePlanExcludingTwoThousandAndTenLongTermIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_2521fc1f-b00b-4712-a334-0da1502cab94" xlink:to="loc_lfvn_TwoThousandSeventeenLongTermIncentivePlanExcludingTwoThousandAndTenLongTermIncentivePlanMember_baef2e3a-0fa4-4a84-8e69-76761f2a65f1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_TwoThousandSeventeenPerformanceIncentivePlanMember_6f2bb8c5-6d0c-49d9-ba8e-18395a3ff7a9" xlink:href="lfvn-20191231.xsd#lfvn_TwoThousandSeventeenPerformanceIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_2521fc1f-b00b-4712-a334-0da1502cab94" xlink:to="loc_lfvn_TwoThousandSeventeenPerformanceIncentivePlanMember_6f2bb8c5-6d0c-49d9-ba8e-18395a3ff7a9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lfvn_EmployeeStockPurchasePlanMember_f40d46fa-5acd-4ae6-96e1-bbb82087c45f" xlink:href="lfvn-20191231.xsd#lfvn_EmployeeStockPurchasePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_2521fc1f-b00b-4712-a334-0da1502cab94" xlink:to="loc_lfvn_EmployeeStockPurchasePlanMember_f40d46fa-5acd-4ae6-96e1-bbb82087c45f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_46ad4725-98b5-4568-863e-09637dbad03c" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fabe5a8a-e9fb-4ff4-93b4-e7c9120e9c7b" xlink:to="loc_srt_RangeAxis_46ad4725-98b5-4568-863e-09637dbad03c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_46ad4725-98b5-4568-863e-09637dbad03c_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_46ad4725-98b5-4568-863e-09637dbad03c" xlink:to="loc_srt_RangeMember_46ad4725-98b5-4568-863e-09637dbad03c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c4c1a1ce-d142-4654-b7a6-c1cb99e61fbc" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_46ad4725-98b5-4568-863e-09637dbad03c" xlink:to="loc_srt_RangeMember_c4c1a1ce-d142-4654-b7a6-c1cb99e61fbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_1e7a1bb9-f66a-4247-b13a-5e3dc2a17f01" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c4c1a1ce-d142-4654-b7a6-c1cb99e61fbc" xlink:to="loc_srt_MinimumMember_1e7a1bb9-f66a-4247-b13a-5e3dc2a17f01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_091b2ea0-dea1-4e3b-92a4-38f9763b5937" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c4c1a1ce-d142-4654-b7a6-c1cb99e61fbc" xlink:to="loc_srt_MaximumMember_091b2ea0-dea1-4e3b-92a4-38f9763b5937" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lifevantage.com/role/CommitmentsandContingencies" xlink:type="simple" xlink:href="lfvn-20191231.xsd#CommitmentsandContingencies"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/CommitmentsandContingencies" xlink:type="extended" id="i9a229c9e04824c78bbbae4c98f8aa363_0b30e849-8589-4ba2-90d3-72683215682f"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/RelatedPartyTransactions" xlink:type="simple" xlink:href="lfvn-20191231.xsd#RelatedPartyTransactions"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/RelatedPartyTransactions" xlink:type="extended" id="i25d27d0127494ad68afbbce47fe611ff_39e5c516-aa00-4972-8f39-6caa4deffa68"/>
  <link:roleRef roleURI="http://www.lifevantage.com/role/RelatedPartyDisclosuresDetails" xlink:type="simple" xlink:href="lfvn-20191231.xsd#RelatedPartyDisclosuresDetails"/>
  <link:definitionLink xlink:role="http://www.lifevantage.com/role/RelatedPartyDisclosuresDetails" xlink:type="extended" id="i176623a97eea4941ba1aed6d557132cd_c7803496-0091-4a14-bf10-ae848c71e93c">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_15af74a9-4b85-4410-8ebd-3e67106f5dfe" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_f3aad486-2931-42f2-a13e-a5dffb27aecf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_15af74a9-4b85-4410-8ebd-3e67106f5dfe" xlink:to="loc_us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_f3aad486-2931-42f2-a13e-a5dffb27aecf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4b031e6e-5bec-4c79-b8fc-c9eec2a163f3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_15af74a9-4b85-4410-8ebd-3e67106f5dfe" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4b031e6e-5bec-4c79-b8fc-c9eec2a163f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_ff861ccb-f349-4d99-84db-307c6aac692e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4b031e6e-5bec-4c79-b8fc-c9eec2a163f3" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_ff861ccb-f349-4d99-84db-307c6aac692e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_ff861ccb-f349-4d99-84db-307c6aac692e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_ff861ccb-f349-4d99-84db-307c6aac692e" xlink:to="loc_us-gaap_RelatedPartyDomain_ff861ccb-f349-4d99-84db-307c6aac692e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_a4f3d22e-f20e-43a5-938d-cfe0fcc79c7a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_ff861ccb-f349-4d99-84db-307c6aac692e" xlink:to="loc_us-gaap_RelatedPartyDomain_a4f3d22e-f20e-43a5-938d-cfe0fcc79c7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_8f8bd52a-0d45-4a93-8183-c935bf4ff020" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_a4f3d22e-f20e-43a5-938d-cfe0fcc79c7a" xlink:to="loc_srt_AffiliatedEntityMember_8f8bd52a-0d45-4a93-8183-c935bf4ff020" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>




