/ Dictionary / Index M Martinmas: Meaning and Definition of Find definitions for: Mar•tin•mas Pronunciation: (mär'tn-mus), [key] — n. a church festival, November 11, in honor of St. Martin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: martinmas (Thesaurus) Matin Luther King Day Martinon Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language