/ Dictionary / Index M middlebreaker: Meaning and Definition of Find definitions for: mid•dle•break•er Pronunciation: (mid'l-brā"kur), [key] — n. lister (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: middlebreaker (Thesaurus) Middleborough middlebrow Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language