/di lear"ee euhm/ , n. , pl. deliriums, deliria /-lear"ee euh/ .
1. Pathol. a more or less temporary disorder of the mental faculties, as in fevers, disturbances of consciousness, or intoxication, characterized by restlessness, excitement, delusions, hallucinations, etc.
2. a state of violent excitement or emotion.
[ 1590-1600; delirium frenzy, equiv. to delir ( are ) (see DELIRATION) + -ium -IUM ]