/ Dictionary / Index M mop-up: Meaning and Definition of Find definitions for: mop-up Pronunciation: (mop'up"), [key] — n. the act, process, or an instance of mopping up; completion of an operation or action. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mop-up (Thesaurus) M.Opt. mopy Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language