definition
In psychotherapy and psychiatry, a state of mind producing serious, long-term lowering of enjoyment of life or inability to visualize a happy future.
example
I used to suffer from depression, but now I'm mostly content with my life.
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An area that is lower in topography than its surroundings.
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In psychotherapy and psychiatry, a period of unhappiness or low morale which lasts longer than several weeks and may include ideation of self-inflicted injury or suicide.
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An area of lowered air pressure that generally brings moist weather, sometimes promoting hurricanes and tornadoes.
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A period of major economic contraction.
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Four consecutive quarters of negative, real GDP growth. See NBER.
example
The Great Depression was the worst financial event in US history.
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The act of lowering or pressing something down.
example
Depression of the lever starts the machine.
definition
A lowering, in particular a reduction in a particular biological variable or the function of an organ, in contrast to elevation.