Definition of bipolar disorder
: any of several psychological disorders of mood characterized usually by alternating episodes of depression and mania —called also manic depression, manic-depressive illness
First Known Use of bipolar disorder
Medical Definition of bipolar disorder
: any of several mood disorders characterized usually by alternating episodes of depression and mania ◆The mania experienced in bipolar disorder may be of the euphoric or irritable type or both. —called also bipolar affective disorder, bipolar illness, manic depression, manic-depressive illness, manic-depressive psychosis; compare major depressive disorder
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