GNU Collaborative International Dictionary of English

Found one definition 

  1.       

    Delirium , n. [L., fr. delirare to rave, to wander in mind, prop., to go out of the furrow in plowing; de- + lira furrow, track; perh. akin to G. geleise track, rut, and E. last to endure.]
    1.  (Med.) 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.
      1913 Webster
    2. Strong excitement; wild enthusiasm; madness.
      1913 Webster
      The popular delirium [of the French Revolution] at first caught his enthusiastic mind.
      W. Irving.

      1913 Webster
      The delirium of the preceding session (of Parliament).
      Morley.

      1913 Webster
      Delirium tremens . [L., trembling delirium] (Med.), a violent delirium induced by the excessive and prolonged use of intoxicating liquors. -- Traumatic delirium (Med.), a variety of delirium following injury.
      Syn. -- Insanity; frenzy; madness; derangement; aberration; mania; lunacy; fury. See Insanity.
      1913 Webster