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depression

n.

1. 1. The act of depressing.
   2. The condition of being depressed.
2. An area that is sunk below its surroundings; a hollow.
3. The condition of feeling sad or despondent.
4. Psychology. A psychiatric disorder characterized by an inability to concentrate, insomnia, loss of appetite, anhedonia, feelings of extreme sadness, guilt, helplessness and hopelessness, and thoughts of death. Also called clinical depression.
5. 1. A reduction in activity or force.
   2. A reduction in physiological vigor or activity: a depression in respiration.
   3. A lowering in amount, degree, or position.
6. Economics.
   1. A period of drastic decline in a national or international economy, characterized by decreasing business activity, falling prices, and unemployment.
   2. Depression The worldwide economic depression from the late 1920s through the 1930s. In the United States, it began with the stock market crash in October, 1929.
7. Meteorology. A region of low barometric pressure.
8. The angular distance below the horizontal plane through the point of observation.
9. Astronomy. The angular distance of a celestial body below the horizon.

Depression is a mood disorder, understood from the psychoanalytical viewpoint as resulting from an intrapsychic conflict that stems from the ego's difficulties in integrating aggressive drives that are experienced as too dangerous for the preservation of libidinally cathected objects. These aggressive drives turn against the subject via the superego, which becomes too strict and demanding. Depressive manifestations are frequent in other clinical entities where the conflicts are essentially intrapsychic, such as the psychoneuroses.


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