/ Dictionary / Index M mistrustful: Meaning and Definition of Find definitions for: mis•trust•ful Pronunciation: (mis-trust'ful), [key] — adj. full of mistrust; suspicious. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mistrustful (Thesaurus) mistrust mistryst Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language