(noun) a person judged to be legally or medically insane
(noun) someone with a sociopathic personality; a person with an antisocial personality disorder (`psychopath' was once widely used but has now been superseded by `sociopath')
(noun) a boldly flirtatious or sexually promiscuous woman
(noun) wife of Ahab who was king of Israel; according to the Old Testament she was a cruel immoral queen who fostered the worship of Baal and tried to kill Elijah and other prophets of Israel (9th century BC)