trionounmasculine/ˈtɾiu/hightri·oPortuguesEnglishEspanolFrancaisDefinitionA group of three people or things; a group of three musicians or a musical composition for three voices or instruments.They formed a trio to play at the party.A trio of friends traveled to the Algarve.synthreesometrioCommon collocationsmusical trioto form a triojazz triostring trioEtymologyDo italiano 'trio'.Related wordstriolettrio-vozes