/ Dictionary / Index M Master of Science: Meaning and Definition of Find definitions for: Mas'ter of Sci'ence Pronunciation: [key] a master's degree given usually in a specific branch of the natural sciences, mathematics, or technology. a person who has been awarded this degree. Abbr.: M.S., M.Sc., S.M., Sc.M. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. master of foxhounds Master of the Revels Related Content Daily Word Quiz: diurnal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language