#1 lunatic s. [moonstruck] insane and believed to be affected by the phases of the moon. wn
#2 lunatic n. [madman, maniac] an insane person. wn
#3 lunatic n. [daredevil, madcap, hothead, swashbuckler, harum-scarum] a reckless impetuous irresponsible person. wn
vizzz