<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 6.3a -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: https://www.novaworks.com -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x00000000 -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#HoldingsByIndustrySector" roleURI="http://xbrl.sec.gov/oef/role/HoldingsByIndustrySector" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#HoldingsByGeographicRegion" roleURI="http://xbrl.sec.gov/oef/role/HoldingsByGeographicRegion" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#HoldingsByCreditQuality" roleURI="http://xbrl.sec.gov/oef/role/HoldingsByCreditQuality" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#HoldingsByMaturity" roleURI="http://xbrl.sec.gov/oef/role/HoldingsByMaturity" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#HoldingsByAssetCategory" roleURI="http://xbrl.sec.gov/oef/role/HoldingsByAssetCategory" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#HoldingsByOtherCategory" roleURI="http://xbrl.sec.gov/oef/role/HoldingsByOtherCategory" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#HoldingsByOtherCategory2" roleURI="http://xbrl.sec.gov/oef/role/HoldingsByOtherCategory2" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#LargestHoldings" roleURI="http://xbrl.sec.gov/oef/role/LargestHoldings" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ProspectusOnly" roleURI="http://xbrl.sec.gov/rr/role/ProspectusOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#RiskOnly" roleURI="http://xbrl.sec.gov/rr/role/RiskOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#CoregistrantOnly" roleURI="http://xbrl.sec.gov/oef/role/CoregistrantOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SeriesOnly" roleURI="http://xbrl.sec.gov/oef/role/SeriesOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly" roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#PerformanceMeasureOnly" roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#HoldingAssetCategoryOnly" roleURI="http://xbrl.sec.gov/oef/role/HoldingAssetCategoryOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#BroadBasedIndexOnly" roleURI="http://xbrl.sec.gov/oef/role/BroadBasedIndexOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#AdditionalIndexOnly" roleURI="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#IndustrySectorOnly" roleURI="http://xbrl.sec.gov/oef/role/IndustrySectorOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#GeographicRegionOnly" roleURI="http://xbrl.sec.gov/oef/role/GeographicRegionOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#CreditQualityOnly" roleURI="http://xbrl.sec.gov/oef/role/CreditQualityOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#MaturityOnly" roleURI="http://xbrl.sec.gov/oef/role/MaturityOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#Other1CategoryOnly" roleURI="http://xbrl.sec.gov/oef/role/Other1CategoryOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#Other2CategoryOnly" roleURI="http://xbrl.sec.gov/oef/role/Other2CategoryOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#LargestHoldingOnly" roleURI="http://xbrl.sec.gov/oef/role/LargestHoldingOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SalesLoadOnly" roleURI="http://xbrl.sec.gov/oef/role/SalesLoadOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#HoldingMeasureOnly" roleURI="http://xbrl.sec.gov/oef/role/HoldingMeasureOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ValueMeasureOnly" roleURI="http://xbrl.sec.gov/oef/role/ValueMeasureOnly" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm" roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#notAll" arcroleURI="http://xbrl.org/int/dim/arcrole/notAll" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" />
    <link:definitionLink xlink:type="extended" xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaapInvestmentTypeCategorizationMember" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryBillsMember" xlink:label="loc_rparUSTreasuryBillsMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapInvestmentTypeCategorizationMember" xlink:to="loc_rparUSTreasuryBillsMember" xlink:type="arc" order="1000" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember" xlink:label="loc_us-gaapUSTreasurySecuritiesMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapInvestmentTypeCategorizationMember" xlink:to="loc_us-gaapUSTreasurySecuritiesMember" xlink:type="arc" order="1001" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ExchangeTradedFundsMember" xlink:label="loc_us-gaapExchangeTradedFundsMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapInvestmentTypeCategorizationMember" xlink:to="loc_us-gaapExchangeTradedFundsMember" xlink:type="arc" order="1002" />
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/ProspectusOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/CoregistrantOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="loc_oefShareClassDomain" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_C000215408Member" xlink:label="loc_rparC000215408Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefShareClassDomain" xlink:to="loc_rparC000215408Member" xlink:type="arc" order="0" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_C000233167Member" xlink:label="loc_rparC000233167Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefShareClassDomain" xlink:to="loc_rparC000233167Member" xlink:type="arc" order="10" />
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/HoldingAssetCategoryOnly">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaapInvestmentTypeCategorizationMember" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryBillsMember" xlink:label="loc_rparUSTreasuryBillsMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapInvestmentTypeCategorizationMember" xlink:to="loc_rparUSTreasuryBillsMember" xlink:type="arc" order="0" />
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/BroadBasedIndexOnly">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BroadBasedIndexDomain" xlink:label="loc_oefBroadBasedIndexDomain" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_SAndP500TotalReturnIndexMember" xlink:label="loc_rparSAndP500TotalReturnIndexMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefBroadBasedIndexDomain" xlink:to="loc_rparSAndP500TotalReturnIndexMember" xlink:type="arc" order="0" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_SixtySAndP500Index40BloombergUSAggregateBondIndexMember" xlink:label="loc_rparSixtySAndP500Index40BloombergUSAggregateBondIndexMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefBroadBasedIndexDomain" xlink:to="loc_rparSixtySAndP500Index40BloombergUSAggregateBondIndexMember" xlink:type="arc" order="10" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_AdvancedResearchRiskParityIndexMember" xlink:label="loc_rparAdvancedResearchRiskParityIndexMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefBroadBasedIndexDomain" xlink:to="loc_rparAdvancedResearchRiskParityIndexMember" xlink:type="arc" order="20" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_AdvancedResearchUltraRiskParityIndexMember" xlink:label="loc_rparAdvancedResearchUltraRiskParityIndexMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefBroadBasedIndexDomain" xlink:to="loc_rparAdvancedResearchUltraRiskParityIndexMember" xlink:type="arc" order="30" />
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/IndustrySectorOnly">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndustrySectorDomain" xlink:label="loc_oefIndustrySectorDomain" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_OilAndGasSectorMember" xlink:label="loc_rparOilAndGasSectorMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefIndustrySectorDomain" xlink:to="loc_rparOilAndGasSectorMember" xlink:type="arc" order="0" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_RenewableEnergySectorMember" xlink:label="loc_rparRenewableEnergySectorMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefIndustrySectorDomain" xlink:to="loc_rparRenewableEnergySectorMember" xlink:type="arc" order="10" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_CashAndOtherSectorMember" xlink:label="loc_rparCashAndOtherSectorMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefIndustrySectorDomain" xlink:to="loc_rparCashAndOtherSectorMember" xlink:type="arc" order="20" />
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/GeographicRegionOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/CreditQualityOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/MaturityOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/Other1CategoryOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/Other2CategoryOnly" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/LargestHoldingOnly">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LargestHoldingsDomain" xlink:label="loc_oefLargestHoldingsDomain" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_VanguardTotalStockMarketETFMember" xlink:label="loc_rparVanguardTotalStockMarketETFMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparVanguardTotalStockMarketETFMember" xlink:type="arc" order="0" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryBill1292026333Member" xlink:label="loc_rparUSTreasuryBill1292026333Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparUSTreasuryBill1292026333Member" xlink:type="arc" order="10" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_SPDRGoldMiniSharesTrustMember" xlink:label="loc_rparSPDRGoldMiniSharesTrustMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparSPDRGoldMiniSharesTrustMember" xlink:type="arc" order="20" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_VanguardFTSEEmergingMarketsETFMember" xlink:label="loc_rparVanguardFTSEEmergingMarketsETFMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparVanguardFTSEEmergingMarketsETFMember" xlink:type="arc" order="30" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_VanguardFTSEDevelopedMarketsETFMember" xlink:label="loc_rparVanguardFTSEDevelopedMarketsETFMember" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparVanguardFTSEDevelopedMarketsETFMember" xlink:type="arc" order="40" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryInflationIndexedBonds13802152044Member" xlink:label="loc_rparUSTreasuryInflationIndexedBonds13802152044Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparUSTreasuryInflationIndexedBonds13802152044Member" xlink:type="arc" order="50" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryInflationIndexedBonds10002152046Member" xlink:label="loc_rparUSTreasuryInflationIndexedBonds10002152046Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparUSTreasuryInflationIndexedBonds10002152046Member" xlink:type="arc" order="60" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryInflationIndexedBonds07502152042Member" xlink:label="loc_rparUSTreasuryInflationIndexedBonds07502152042Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparUSTreasuryInflationIndexedBonds07502152042Member" xlink:type="arc" order="70" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryInflationIndexedBonds07502152045Member" xlink:label="loc_rparUSTreasuryInflationIndexedBonds07502152045Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparUSTreasuryInflationIndexedBonds07502152045Member" xlink:type="arc" order="80" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryInflationIndexedBonds06302152043Member" xlink:label="loc_rparUSTreasuryInflationIndexedBonds06302152043Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparUSTreasuryInflationIndexedBonds06302152043Member" xlink:type="arc" order="90" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryInflationIndexedBonds08802152047Member" xlink:label="loc_rparUSTreasuryInflationIndexedBonds08802152047Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparUSTreasuryInflationIndexedBonds08802152047Member" xlink:type="arc" order="100" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryInflationIndexedBonds10002152048Member" xlink:label="loc_rparUSTreasuryInflationIndexedBonds10002152048Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparUSTreasuryInflationIndexedBonds10002152048Member" xlink:type="arc" order="110" />
      <link:loc xlink:type="locator" xlink:href="rpar-20251231.xsd#rpar_USTreasuryInflationIndexedBonds21302152041Member" xlink:label="loc_rparUSTreasuryInflationIndexedBonds21302152041Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oefLargestHoldingsDomain" xlink:to="loc_rparUSTreasuryInflationIndexedBonds21302152041Member" xlink:type="arc" order="120" />
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/SalesLoadOnly" />
</link:linkbase>
