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Adjective: dull (duller,dullest)  dúl
  1. Lacking in liveliness or animation
    "he was so dull at parties"; "a dull political campaign"; "a large dull impassive man"; "dull days with nothing to do"; "how dull and dreary the world is"; "fell back into one of her dull moods";
    - hebetudinous
     
  2. Emitting or reflecting very little light
    "a dull glow"; "dull silver badly in need of a polish"; "a dull sky"
     
  3. Being or made softer or less loud or clear
    "the dull boom of distant breaking waves";
    - muffled, muted, softened
     
  4. So lacking in interest as to cause mental weariness
    "a dull play"; "his competent but dull performance";
    - boring, deadening, ho-hum, irksome, slow, tedious, tiresome, wearisome, deadly, unamusing, draggy, mind-numbing
     
  5. (of colour) very low in saturation; highly diluted
    "dull greens and blues"
     
  6. Not keenly felt
    "a dull throbbing"; "dull pain"
     
  7. Taking more than usual time to learn or understand; lacking intellectual acuity
    "although dull at classical learning, at mathematics he was uncommonly quick";
    - dense, dim, dumb, obtuse, slow
     
  8. (of business) not active or brisk
    "business is dull";
    - slow, sluggish
     
  9. Not having a sharp edge or point
    "the knife was too dull to be of any use"
     
  10. Blunted in responsiveness or sensibility
    "a dull gaze"; "so exhausted she was dull to what went on about her"
     
  11. Not clear and resonant; sounding as if striking with or against something relatively soft
    "the dull thud";
    - thudding
     
  12. Darkened with overcast
    "a dull sky";
    - leaden
Verb: dull  dúl
  1. Make dull in appearance
    "Age had dulled the surface"
     
  2. Become dull or lusterless in appearance; lose shine or brightness
    "the varnished table top dulled with time"
     
  3. Deaden (a sound or noise), especially by wrapping
    - muffle, mute, damp, dampen, tone down
     
  4. Make numb or insensitive
    "The shock dulled her senses";
    - numb, benumb, blunt
     
  5. Make dull or blunt
    "Too much cutting dulls the knife's edge";
    - blunt
     
  6. Become less interesting or attractive
    - pall
     
  7. Make less lively or vigorous
    "Middle age dulled her appetite for travel"

Derived forms: dulled, duller, dullest, dulling, dulls

See also: arid, blunt, blunted, bovine, brightness, brightness level, cloudy, colorless [US], colourless [Brit, Cdn], deadened, desiccate, desiccated, drab, dreary, dulled, dullness, edgeless, flat, heavy, humdrum, inactive, insensitive, lackluster [US], lacklustre [Brit, Cdn], lame, lameo [informal], leaden, light, luminance, luminosity, luminousness, lusterless [N. Amer], lustreless [Brit, Cdn], mat, matt, matte, matted, meh [informal], monotonous, monotonousness, nonresonant, samey [Brit], soft, spiritless, stupid, subdued, unanimated, uninspiring, uninteresting, unpolished, unreverberant, unsaturated, unsharpened

Type of: alter, change, desensitise [Brit], desensitize, modify, soften, weaken

Antonym: bright, lively, sharp, sharpen

Encyclopedia: Dull, Perth & Kinross