quinquagenary UK /ˌkwɪŋkwəˈd͡ʒiːn(ə)ɹi/US /kwɪŋˈkwæd͡ʒəˌnɛɹi/adjective 2noun 2forms 1 adjective2 •Of or related to 50-year anniversaries. •Synonym of quinquagenarian: Of or related to fiftysomethings. noun2 •A 50-year anniversary. •(no longer used, rare) Synonym of pentecoster: an officer who commands 50 men. formsquinquagenaries
