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Noun: foolishness  foo-lish-nus
  1. The trait of acting stupidly or rashly
    "His foolishness in investing all his savings in a single stock led to financial ruin";
    - folly, unwiseness, daftness
     
  2. The quality of being rash and foolish
    "adjusting to an insane society is total foolishness";
    - folly, craziness, madness, nuttiness [informal], insanity
     
  3. A stupid mistake
    "His foolishness at the formal dinner embarrassed everyone";
    - stupidity, bêtise, folly, imbecility

Type of: daftness [informal], error, fault, feeblemindedness, mistake, stupidity, trait

Encyclopedia: Foolishness