/ Dictionary / Index M mud crack: Meaning and Definition of Find definitions for: mud' crack" Pronunciation: [key] a fracture, part of a desiccation pattern, caused by the drying out and shrinking of silt or clay. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mudcat mud dauber Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language