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Meaning of lunatic

lu•na•tic

Pronunciation: (l'nu-tik), [key]
— n.
  1. an insane person.
  2. a person whose actions and manner are marked by extreme eccentricity or recklessness.
  3. a person legally declared to be of unsound mind and who therefore is not held capable or responsible before the law.
—adj.
  1. insane; demented; crazy.
  2. characteristic or suggestive of lunacy; wildly or recklessly foolish.
  3. designated for or used by the insane: a lunatic asylum.
  4. gaily or lightheartedly mad, frivolous, eccentric, etc.: She has a lunatic charm that is quite engaging.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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