/ Dictionary / Index M mistrial: Meaning and Definition of Find definitions for: mis•tri•al Pronunciation: (mis-trī'ul, -trīl'), [key] — n. Law. a trial terminated without conclusion on the merits of the case because of some error in the proceedings. an inconclusive trial, as where the jury cannot agree. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mistrial (Thesaurus) mistress of ceremonies mistrust Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language