Breadcrumb Home > Dictionary > Index G grimace: Meaning and Definition of Find definitions for: grim•ace Pronunciation: (grim'us, gri-mās'), [key] — n., v., -aced, -ac•ing. —n. a facial expression, often ugly or contorted, that indicates disapproval, pain, etc. —v.i. to make grimaces. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: grimace (Thesaurus) grim Grimaldi TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: locution Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language