/ Dictionary / Index G grim: Meaning and Definition of Find definitions for: grim Pronunciation: (grim), [key] — grim•mer, grim•mest. stern and admitting of no appeasement or compromise: grim determination; grim necessity. of a sinister or ghastly character; repellent: a grim joke. having a harsh, surly, forbidding, or morbid air: a grim man but a just one; a grim countenance. fierce, savage, or cruel: War is a grim business. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: grim (Thesaurus) grilse grimace Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language