|a mental health problem characterized by an alternation between extreme euphoria and deep depression|
|usage Though manic depression, manic-depressive are still often used by the general public, they are seen as having negative connotations. The preferred terms nowadays are bipolar disorder and experiencing bipolar disorder|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a chattering or flighty, light-headed person.|
manic-depressive illness n.
See bipolar disorder.