'Depression' may refer to:
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Depression (mood), a common term for a sad or low mood or the loss of pleasure; an emotion that does not affect capacity to perform personal and vocational obligations
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Clinical depression, or major depressive disorder, a state of intense sadness, melancholia or despair that has advanced to the point of being disruptive to an individual's social functioning and/or activities of daily living
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Depression (geology), a sunken geological formation
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Depression (economics), a longer-lasting and more severe economic downturn than a recession
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★ The
Great Depression, a severe economic recession in the 1930s
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Depression (meteorology), an area of low atmospheric pressure associated with cyclones and weather fronts
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Depression (physiology), a lowering, in particular a reduction in a particular biological variable or the function of an organ, contrasted to ''elevation''
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Depression (kinesiology), an anatomical term of motion