/ Dictionary / Index A Adventist: Meaning and Definition of Find definitions for: Ad•vent•ist Pronunciation: (ad'ven-tist, ad-ven'-), [key] — n. a member of any of certain Christian denominations that maintain that the Second Advent of Christ is imminent. —adj. of or pertaining to Adventists. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: adventist (Thesaurus) advent adventitia Related Content Daily Word Quiz: beseech Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language