de·pres·sion ( P ) Pronunciation Key (d-prshn)n.
The act of depressing.
The condition of being depressed.
An area that is sunk below its surroundings; a hollow.
The condition of feeling sad or despondent.
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.