/ Dictionary / Index D deist: Meaning and Definition of Find definitions for: de•ist Pronunciation: (dē'ist), [key] — n. a person who believes in deism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: deist (Thesaurus) deisolate deity Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language