Breadcrumb Home > Dictionary > Index M M.S.M.: Meaning and Definition of Find definitions for: M.S.M. Pronunciation: [key] Master of Sacred Music. Master of Science in Music. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. M.S.L. M.S.M.E. TrendingHere are the facts and trivia that people are buzzing about. The Book of Philippians: Summary Current Events This Week: May 2023 Preamble of the United Nations Charter Queen Victoria Books of the Bible: New Testament Books in Order The 88 Recognized Constellations ✖ Related Content Daily Word Quiz: miasma Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language