1. Lacking in light; not bright or harsh
   "a dim light beside the bed";
   - subdued
    
2. Lacking clarity or distinctness
   "a dim figure in the distance";
   - faint, shadowy, vague, wispy
    
3. Made dim or less bright
   "the dim houselights brought a hush of anticipation";
   - dimmed
    
4. Offering little or no hope
   "took a dim view of things";
   - black, bleak
    
5. [informal] Taking more than usual time to learn or understand; lacking intellectual acuity
   "never met anyone quite so dim";
   - dense, dull, dumb, obtuse, slow

1. Make dim or lusterless
   "Time had dimmed the silver"
    
2. Become dim or lusterless
   "the lights dimmed and the curtain rose"
    
3. Make dim by comparison or conceal
   "The glare dimmed the stars";
   - blind
    
4. Switch (a car's headlights) from a higher to a lower beam
   "The driver dimmed his lights for oncoming traffic";
   - dip
    
5. Become vague or indistinct
   "The distinction between the two theories dimmed";
   - blur, slur

Derived forms: dimmer, dimmest, dimming, dimmed, dims

See also: daft [Brit, informal], dark, dumb, foolish, hopeless, imbecile, imbecilic, indistinct, low-beam, stupid

Type of: change, change intensity, darken, weaken

Antonym: bright

Encyclopedia: Dim, Iran