(Noun)
formerly referred to as manic-depression; an illness that affects mood and thought processees; characterized by violent and often swift mood swings from deep depression to euphoria, or vice versa; can cause psychosis is some people
Bipolar Disorder rate this definition:
(Noun)
This is a disorder but more than one mood disorder makes up the disorder. The symptoms include: Mania Depression Mixed (Mania cycling to depression and vice versa continually). Studies suggest that neurobiology can help find the cause of this disorder.
Usage: He had bipolar disorder and was such a self-educated boy in spite of his disabling disorder.