/ Dictionary / Index M millennial: Meaning and Definition of Find definitions for: mil•len•ni•al Pronunciation: (mil-len'ē-ul), [key] — adj. of or pertaining to a millennium or the millennium. worthy or suggestive of the millennium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: millennial (Thesaurus) millenary Millennial Church Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language