/ Dictionary / Index M missive: Meaning and Definition of Find definitions for: mis•sive Pronunciation: (mis'iv), [key] — n. a written message; letter. —adj. sent or about to be sent, esp. of a letter from an official source. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: missive (Thesaurus) Mississippian Miss Julie* Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language