noun (n)

• obsolete terms for legal insanity(noun.state)

  Synonym:
  insaneness, madness
  

  source: wordnet30
• foolish or senseless behavior(noun.act)

  Synonym:
  craziness, folly, foolery, indulgence, tomfoolery
  

  source: wordnet30
• Insanity or madness; properly, the kind of insanity which is broken by intervals of reason, -- formerly supposed to be influenced by the changes of the moon; any form of unsoundness of mind, except idiocy; mental derangement or alienation.(noun)

  source: webster1913