adj. 1 obscure, obscured, vague, faint, weak, weakened, pale, imperceptible, fuzzy, indistinct, ill-defined, indiscernible, undefined, indistinguishable, foggy, clouded, cloudy, nebulous, blurred, blurry, unclear, dull, hazy, misty, dark, shadowy, murky, tenebrous, gloomy, sombre, dusky, crepuscular Her beauty made The bright world dim We could barely see in the dim light of the cave. 2 stupid, obtuse, doltish, dull, dull-witted, foolish, slow-witted, dim-witted, dense, Colloq thick, dumb Anyone who can't understand that is really quite dim
v. 3 obscure, dull, becloud His natural feelings of compassion had been dimmed by neglect 4 darken, bedim, shroud, shade Twilight dims the sky above The stage-lights dimmed and the curtain fell.