/ Dictionary / Index M Matsys: Meaning and Definition of Find definitions for: Mat•sys Pronunciation: (mät'sīs), [key] — n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Matsuyama matt Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language