ETYM Latin mania, Greek, to rage; cf. Old Eng. manie, French manie. Related to Mind, Necromancy.
1. A mood disorder; an affective disorder in which the victim tends to respond excessively and sometimes violently; SYN. manic disorder.
2. An irrational but irresistible motive for a belief or action; SYN. passion, cacoethes.