a temporary state of extreme mental excitement, marked by restlessness, confused speech, and hallucinations: it sometimes occurs during a fever or in some forms of insanity
uncontrollably wild excitement or emotion: a delirium of joy
See delirium in American Heritage Dictionary 4
(dĭ-lîrˈē-əm)
nounpl.de·lir·i·ums or de·lir·i·a(-ē-ə)
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.
A state of uncontrolled excitement or emotion: sports fans in delirium after their team's victory.