depressions Definition

an act of depressing or a state of being depressed: such as

a state of feeling sad : dejection

a mood disorder marked especially by sadness, inactivity, difficulty in thinking and concentration, a significant increase or decrease in appetite and time spent sleeping, feelings of dejection and hopelessness, and sometimes suicidal tendencies

any of several psychological disorders of mood characterized usually by alternating episodes of depression and mania —called also manic depression, manic-depressive illness

major depressive disorder

an episode of depression characteristic of major depressive disorder