/ Dictionary / Index M mussy: Meaning and Definition of Find definitions for: muss•y Pronunciation: (mus'ē), [key] — muss•i•er, muss•i•est. untidy, messy, or rumpled. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mussy (Thesaurus) Mussulman must Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language