<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd http://xbrl.org/2005/xbrldt http://www.xbrl.org/2005/xbrldt-2005.xsd" xmlns:cik0002018846="http://www.MFS.com/20260228">
	<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/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: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://www.xbrl.org/2009/arcrole/dep-concept-deprecatedConcept" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/arcrole/deprecated-2009-12-16.xsd#dep-concept-deprecatedConcept" />
	<link:roleRef roleURI="http://www.MFS.com/20260228/role/RRRiskTable3" xlink:type="simple" xlink:href="c485bpos-20260518.xsd#RRRiskTable3" />
	<link:roleRef roleURI="http://www.MFS.com/20260228/role/RRRiskTable5" xlink:type="simple" xlink:href="c485bpos-20260518.xsd#RRRiskTable5" />
	<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SeriesOnly" />
	<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly" />
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ShareholderFeesData" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderFeesData" />
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/OperatingExpensesData" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#OperatingExpensesData" />
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#RiskOnly" />
	<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly">
		<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_S000104938Member" xlink:label="S000104938Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000104938Member" order="1.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_S000104939Member" xlink:label="S000104939Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000104939Member" order="2.0" />
	</link:definitionLink>
	<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="ShareClassDomain" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_C000275596Member" xlink:label="C000275596Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000275596Member" order="1.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_C000275597Member" xlink:label="C000275597Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000275597Member" order="2.0" />
	</link:definitionLink>
	<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly">
		<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_PrincipalRisks2Member" xlink:label="PrincipalRisks2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="PrincipalRisks2Member" order="1.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_InvestmentSelectionRisk2Member" xlink:label="InvestmentSelectionRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="InvestmentSelectionRisk2Member" order="2.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_EquityMarketRiskCompanyRisk2Member" xlink:label="EquityMarketRiskCompanyRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="EquityMarketRiskCompanyRisk2Member" order="3.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_ValueCompanyRisk2Member" xlink:label="ValueCompanyRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ValueCompanyRisk2Member" order="4.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_ForeignRisk2Member" xlink:label="ForeignRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ForeignRisk2Member" order="5.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_EmergingMarketsRisk2Member" xlink:label="EmergingMarketsRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRisk2Member" order="6.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_CurrencyRisk2Member" xlink:label="CurrencyRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CurrencyRisk2Member" order="7.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_FocusRisk2Member" xlink:label="FocusRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="FocusRisk2Member" order="8.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_LiquidityRisk2Member" xlink:label="LiquidityRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="LiquidityRisk2Member" order="9.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_FluctuationofNetAssetValueandSharePriceRisk2Member" xlink:label="FluctuationofNetAssetValueandSharePriceRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="FluctuationofNetAssetValueandSharePriceRisk2Member" order="10.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_AuthorizedParticipantRisks2Member" xlink:label="AuthorizedParticipantRisks2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="AuthorizedParticipantRisks2Member" order="11.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_TradingIssuesRisk2Member" xlink:label="TradingIssuesRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="TradingIssuesRisk2Member" order="12.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_CashTransactionsRisk2Member" xlink:label="CashTransactionsRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CashTransactionsRisk2Member" order="13.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_GrowthCompanyRisk2Member" xlink:label="GrowthCompanyRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="GrowthCompanyRisk2Member" order="14.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_SmalltoMediumCapRisk2Member" xlink:label="SmalltoMediumCapRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="SmalltoMediumCapRisk2Member" order="15.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_InvestmentStrategyRisk2Member" xlink:label="InvestmentStrategyRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="InvestmentStrategyRisk2Member" order="16.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_REITsRisk2Member" xlink:label="REITsRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="REITsRisk2Member" order="17.0" />
		<link:loc xlink:type="locator" xlink:href="c485bpos-20260518.xsd#cik0002018846_CapacityRisk2Member" xlink:label="CapacityRisk2Member" />
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CapacityRisk2Member" order="18.0" />
	</link:definitionLink>
</link:linkbase>