/ Dictionary / Index Q quincentenary: Meaning and Definition of Find definitions for: quin•cen•ten•ar•y Pronunciation: (kwin"sen-ten'u-rē, kwin-sen'tn-er"ē esp. Brit. kwin"sen-tē'nu-rē), [key] — n., pl. adj. -ar•ies, —n. a 500th anniversary or its celebration. —adj. pertaining to or marking a period of 500 years; quincentennial. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quincentenary (Thesaurus) quince quincentennial Related Content Daily Word Quiz: cur Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language