Mania \Ma"ni*a\, n. [L. mania, Gr. ?, fr. ? to rage; cf. OE. manie, F. manie. Cf. {Mind}, n., Necromancy.] 1. Violent derangement of mind; madness; insanity. Cf. {Delirium}. 2. Excessive or unreasonable desire; insane passion affecting one or many people; as, the tulip mania. {Mania a potu} [L.], madness from drinking; delirium tremens. Syn: Insanity; derangement; madness; lunacy; alienation; aberration; delirium; frenzy. See {Insanity}.