'Lunatic' definitions:

Definition of 'lunatic'

From: WordNet
adjective
Insane and believed to be affected by the phases of the moon [syn: lunatic, moonstruck]
noun
An insane person [syn: lunatic, madman, maniac]
noun
A reckless impetuous irresponsible person [syn: daredevil, madcap, hothead, swashbuckler, lunatic, harum- scarum]

Definition of 'Lunatic'

From: GCIDE
  • Lunatic \Lu"na*tic\, a. [F. lunatique, L. lunaticus, fr. luna the moon. See Lunar.]
  • 1. Affected by lunacy; insane; mad; crazy; demented. [1913 Webster]
  • Lord, have mercy on my son; for he is lunatic. --Wyclif (Matt. xvii. 15). [1913 Webster]
  • 2. Of or pertaining to, or suitable for, an insane person; evincing lunacy; as, lunatic gibberish; a lunatic asylum. [1913 Webster]

Definition of 'Lunatic'

From: GCIDE
  • Lunatic \Lu"na*tic\, n. A person affected by lunacy; an insane person, esp. one who has lucid intervals; a madman; a person of unsound mind. [1913 Webster]
  • The lunatic, the lover, and the poet, Are of imagination all compact. --Shak. [1913 Webster]

Definition of 'Lunatic'

From: Easton
  • Lunatic probably the same as epileptic, the symptoms of which disease were supposed to be more aggravated as the moon increased. In Matt. 4:24 "lunatics" are distinguished from demoniacs. In 17:15 the name "lunatic" is applied to one who is declared to have been possessed. (See DAEMONIAC.)

Synonyms of 'lunatic'

From: Moby Thesaurus