/ Dictionary / Index M mut dash: Meaning and Definition of Find definitions for: mut' dash" Pronunciation: [key] a dash equal in length to one side of an em quad; em dash. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mutchkin mute Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language