/ Dictionary / Index M Martin IV: Meaning and Definition of Find definitions for: Martin IV Pronunciation: [key] (Simon de Brie or Simon de Brion) c1210–85, French ecclesiastic: pope 1281–85. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Martin III Martin V Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language