/ Dictionary / Index M mafic: Meaning and Definition of Find definitions for: maf•ic Pronunciation: (maf'ik), [key] — adj. Geol. of or pertaining to rocks rich in dark, ferromagnesian minerals. Cf.(def. 4), Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mafia mafioso Related Content Daily Word Quiz: voracious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language