/ Dictionary / Index M M.S.Ed.: Meaning and Definition of Find definitions for: M.S.Ed. Pronunciation: [key] Master of Science in Education. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. msec M.S.E.E. Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language