|1.||denoting a mental disorder characterized either by an alternation between extreme euphoria and deep depression (bipolar manic-depressive disorder or syndrome) or by depression on its own or (rarely) by elation on its own (unipolar disorder)|
|2.||Compare cyclothymia a person afflicted with this disorder|
Of, relating to, or affected by manic-depressive illness. n.
A person afflicted with manic-depressive illness.