/ Dictionary / Index M mix-up: Meaning and Definition of Find definitions for: mix-up Pronunciation: (miks'up"), [key] — n. a confused state of things; muddle; tangle. a fight. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mix-up (Thesaurus) mixture Miyazaki 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