/ Dictionary / Index Q quinquagenary: Meaning and Definition of Find definitions for: quin•quag•e•nar•y Pronunciation: (kwin-kw'ju-ner"?, kwing-), [key] ? pl. -nar•ies. a 50th anniversary. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. quinquagenarian Quinquagesima Related Content Daily Word Quiz: dentifrice Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language