n.
Pronunciation: di- ' lir- ē - ə m
Function: noun
Etymology: Latin, from delirare to be crazy, literally, to leave the furrow (in plowing), from de- + lira furrow ― more at LEARN
Date: circa 1563
1 : an acute mental disturbance characterized by confused thinking and disrupted attention usually accompanied by disordered speech and hallucinations
2 : frenzied excitement <he would stride about his room in a delirium of joy ― Thomas Wolfe>