/ Dictionary / Index M middlebuster: Meaning and Definition of Find definitions for: mid•dle•bust•er Pronunciation: (mid'l-bus"tur), [key] — n. lister (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Middleburg Heights middle C Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language