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English definition of “bipolar disorder”

bipolar disorder

noun [U]     /baɪˈpəʊ.lə.dɪˌsɔː.dər/ US  /-ˈpoʊ.lɚ.dɪˌsɔːr.dɚ/
a mental illness causing someone to change often from being extremely excited to being very depressedMental and psychiatric disorders
(Definition of bipolar disorder noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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