/ Dictionary / Index M merciful: Meaning and Definition of Find definitions for: mer•ci•ful Pronunciation: (mûr'si-ful), [key] — adj. full of mercy; characterized by, expressing, or showing mercy; compassionate: a merciful God. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: merciful (Thesaurus) Mercier merciless 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