/ Dictionary / Index D demister: Meaning and Definition of Find definitions for: de•mist•er Pronunciation: (dē-mis'tur), [key] — n. defroster (def. 2). a type of defroster for the side window of an automobile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: demister (Thesaurus) demission demit Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language