/ Dictionary / Index Q quinquagenary: Meaning and Definition of Find definitions for: quin•quag•e•nar•y Pronunciation: (kwin-kwä'ju-ner"ē, 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: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language