/ Dictionary / Index C cleanup: Meaning and Definition of Find definitions for: clean•up Pronunciation: (klēn'up"), [key] — n. the act or process of cleaning up. a very large profit: The company made a real cleanup on their new invention. Our best home-run hitter is batting cleanup. the fourth position in the batting order:Our best home-run hitter is batting cleanup. the player who bats in this position. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cleanup (Thesaurus) Cleanthes clear 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