/ Dictionary / Index M merc: Meaning and Definition of Find definitions for: merc Pronunciation: (mûrk, mûrs), [key] — n. Slang. a mercenary soldier. merc. Pronunciation: [key] mercantile. mercurial. mercury. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. merbromin Merca Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language