Webster’s Revised Unabridged Dictionary · 1913
Lunatic
Lu′na·tic (lū′nȧ·tĭk), a. [F. lunatique, L. lunaticus, fr. luna the moon. See Lunar.] 1. Affected by lunacy; insane; mad.
Lord, have mercy on my son; for he is lunatic. Wyclif (Matt. xvii. 15).
2. Of or pertaining to, or suitable for, an insane person; evincing lunacy; as, lunatic gibberish; a lunatic asylum.
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.
The lunatic, the lover, and the poet, Are of imagination all compact. Shak.