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Adjective: dumb (dumber,dumbest)  dúm
  1. Taking more than usual time to learn or understand; lacking intellectual acuity
    "dumb officials make some really dumb decisions";
    - dense, dim, dull, obtuse, slow
     
  2. Temporarily incapable of speaking
    "struck dumb";
    - speechless
     
  3. Lacking the power of human speech
    "dumb animals"
     
  4. Unable to speak because of hereditary deafness
    - mute, silent
     
  5. Devoid of good sense or judgment
    - foolish, daft, stupid

Derived forms: dumbs, dumbest, dumbing, dumber, dumbed

See also: absurd, asinine, cockamamie [N. Amer], cockamamy [N. Amer], cockeyed, derisory, fatuous, fond, goofy, harebrained, idiotic, ill-advised, ill-conceived, impolitic, imprudent, inadvisable, inane, inarticulate, insane, laughable, ludicrous, mad, mindless, misbegotten, misguided, nonsensical, preposterous, rattlebrained, rattlepated, ridiculous, sappy, scatterbrained, scatty [Brit], silly, stupid, unadvisable, unadvised, unarticulate, unwise, vacuous, wacky, whacky, zany

Encyclopedia: Dumb, dumb, dumb, dumb, dumb