·adj Affected by lunacy; insane; mad.
II. Lunatic ·adj Of or pertaining to, or suitable for, an insane person; evincing lunacy; as, lunatic gibberish; a lunatic asylum.
III. Lunatic ·noun A person affected by lunacy; an insane person, ·esp. one who has lucid intervals; a madman; a person of unsound mind.