Delirium

de·lir·i·um
n. pl. de·lir·i·ums or de·lir·i·a

1. A temporary state of mental confusion and fluctuating consciousness resulting from high fever, intoxication, shock, or other causes. It is characterized by anxiety, disorientation, hallucinations, delusions, and incoherent speech.

2. A state of uncontrolled excitement or emotion

de·liri·ant adj.

Noun 1. delirium - state of violent mental agitation
             synonyms: frenzy, hysteria, craze, fury
             related words: nympholepsy, manic disorder, mania, epidemic hysertia, mass hysteria
         2. delirium - a usually brief state of excitement and mental confusion often accompanied by hallucinations
             related words: folie, mental disorder, mental disturbance, psychological disorder, diesturbance - (psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness