/ Dictionary / Index M mud flat: Meaning and Definition of Find definitions for: mud' flat" Pronunciation: [key] a mud-covered, gently sloping tract of land, alternately covered and left bare by tidal waters. the muddy, nearly level bed of a dry lake. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mudfish mudflow 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