Delirium /(dē̇*lĭr"ĭ*ŭm)/

De·lir·i·um

Delirium

n.
  1. A state in which the thoughts, expressions, and actions are wild, irregular, and incoherent; mental aberration; a roving or wandering of the mind, -- usually dependent on a fever or some other disease, and so distinguished from mania, or madness. (Med.)
  2. Strong excitement; wild enthusiasm; madness.
    The popular delirium [of the French Revolution] at first caught his enthusiastic mind.
    The delirium of the preceding session (of Parliament).
    — Morley.

Phrases & Compounds
Delirium tremens
a violent delirium induced by the excessive and prolonged use of intoxicating liquors.
Traumatic delirium
a variety of delirium following injury.