Faintly luminous; somewhat obscure from lack of light or luminosity; dark; obscure; shadowy.Not clearly seen; indistinct; obscured by some intervening medium imperfectly transparent, as mist or haze; misty; hazy; hence, figuratively, not clearly apprehended; faint; vague: as, a dim prospect; a dim recollection.Dull in luster; lusterless; tarnished.Not seeing clearly; having the vision obscured and indistinct, as the eye.Not clearly apprehending; dull of apprehension.=Syn.2. Indistinct, ill-defined, indefinite, shadowy, confused, mysterious, imperfect.n. The dark; darkness; night.To make dim, faint, or obscure; render less bright, clear, or distinct; becloud; obscure; tarnish; sully: as, to dim the eye; to dim the vision; to dim the prospect; to dim gold.To become dim, faint, or obscure; fade.An abbreviation of diminuendo.n. An abbreviation of diminutiven. of the Latin dimidius, one half.