/ Dictionary / Index M Mercier: Meaning and Definition of Find definitions for: Mer•cier Pronunciation: (Fr. mer-syā'), [key] 1851–1926, Belgian cardinal and patriot. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. merci beaucoup* merciful Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language