a. [ F. lunatique, L. lunaticus, fr. luna the moon. See Lunar. ]
Lord, have mercy on my son; for he is lunatic. Wyclif (Matt. xvii. 15). [ 1913 Webster ]
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 ]
n. the members of a political or social group espousing extreme, fanatical, or seemingly irrational views. [ PJC ]