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Definition of delirium noun from the Oxford Advanced Learner's Dictionary

 

delirium

 noun
noun
BrE BrE//dɪˈlɪriəm//
 
, also BrE//ˈlɪəriəm//
 
; NAmE NAmE//dɪˈlɪriəm//
 
[uncountable] Mental and emotional problems
 
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a mental state where somebody becomes delirious, usually because of illness fits of delirium He mumbled in delirium all night. See related entries: Mental and emotional problems Word Origin mid 16th cent.: from Latin, from delirare ‘deviate, be deranged’ (literally ‘deviate from the furrow’), from de- ‘away’ + lira ‘ridge between furrows’.
See the Oxford Advanced American Dictionary entry: delirium

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