(psychology) Depression experienced by a parent, usually the mother, after childbirth.

(economics, business, finance, historical) A major economic collapse characterized by mass unemployment and limited business activity that lasted from 1929 to 1940 in the US and a similar period in many other countries.

Either mild depression (the blues; symptoms include sadness and fatigue) or major depressive disorder.

Alternative spelling of antidepressant

Alternative form of manic depression

(psychology) Winter seasonal affective disorder.

(nautical) To cause the sidereal pole to appear lower or nearer the horizon, as by sailing toward the equator.

(biology) The reduced biological fitness in a given population as a result of inbreeding.

(psychology) Postpartum depression.

(psychology) The combination of depression and dysthymia.