[mass noun]an acutely disturbed state of mind characterized by restlessness, illusions, and incoherence of thought and speech, occurring in fever, intoxication, and other disorders 精神错乱,神志失常,谵妄 ■wild excitement or ecstasy 极度兴奋,狂乱
语源
mid 16th cent.: from Latin, from delirare 'deviate, be deranged' (literally 'deviate from the furrow'), from de- 'away' + lira 'ridge between furrows'