Breadcrumb Home > Dictionary > Index M Martin I: Meaning and Definition of Find definitions for: Martin I Pronunciation: [key] dieda.d.655, Italian ecclesiastic: pope 649–655. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: martini (Thesaurus) martin Martin II ✖ Related Content Daily Word Quiz: derogate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language