De-lir'i-ūm, n.

n. [Lat., from delirare; It. delirio, Fr. délire. See DELIRATE.]

1. (Med.) A state in which the ideas of a person are wild, irregular, and unconnected; mental aberration; a roving or wandering of the mind, — usually dependent on some other disease, as a fever, and so distinguished from mania, or madness.
2. Strong excitement; wild enthusiasm.

The popular delirium caught his enthusiastic mind. H. Irving. Delirium tremens (Med.), a violent delirium induced by the excessive and prolonged use of intoxicating liquors. Syn.—Insanity; frenzy; madness; derangement. See INSANITY.