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English definition of “deranged”

deranged

adjective uk   /dɪˈreɪndʒd/ us  
completely unable to think clearly or behave in a controlled way, especially because of mental illness: a deranged criminal/mind/personality to be mentally derangedOf unsound mindStupid and silly
derangement
noun [U] uk   /-mənt/ us  
Mental and psychiatric disorders
(Definition of deranged from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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