n. 1 an acutely disordered state of mind involving incoherent speech, hallucinations, and frenzied excitement, occurring in metabolic disorders, intoxication, fever, etc. 2 great excitement, ecstasy. delirium tremens a psychosis of chronic alcoholism involving tremors and hallucinations.
[ L f. delirare be deranged (as DE-, lira ridge between furrows) ]