/ Dictionary / Index Q quadrennium: Meaning and Definition of Find definitions for: quad•ren•ni•um Pronunciation: (kwo-dren'ē-um), [key] — pl. quad•ren•ni•ums, quad•ren•ni•a a period of four years. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quadrennium (Thesaurus) quadrennial quadri- Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language