Definition of mood disorder
: any of several psychological disorders (as major depressive disorder or bipolar disorder) characterized by abnormalities of emotional state —called also affective disorder
First Known Use of mood disorder
Medical Definition of mood disorder
: any of several psychological disorders characterized by abnormalities of emotional state and including especially major depressive disorder, dysthymia, and bipolar disorder—called also affective disorder
Seen and Heard
What made you want to look up mood disorder? Please tell us where you read or heard it (including the quote, if possible).