Lu″na‐tic (?), 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.