/ Dictionary / Index M musty: Meaning and Definition of Find definitions for: mus•ty Pronunciation: (mus'tē), [key] — -ti•er, -ti•est. having an odor or flavor suggestive of mold, as old buildings, long-closed rooms, or stale food. obsolete; outdated; antiquated: musty laws. dull; apathetic. mus•ty Pronunciation: (mus'tē), [key] — pl. -ties. (formerly) a kind of snuff having a musty flavor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: musty (Thesaurus) must-see mut Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language