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Medical Dictionary


noun de·pres·sion \di-ˈpresh-ən\

Medical Definition of depression

  1. 1:  a displacement downward or inward <depression of the jaw>

  2. 2:  an act of depressing or a state of being depressed: asa (1):  a state of feeling sad (2):  a mood disorder marked especially by sadness, inactivity, difficulty with thinking and concentration, a significant increase or decrease in appetite and time spent sleeping, feelings of dejection and hopelessness, and sometimes suicidal thoughts or an attempt to commit suicideb:  a reduction in functional activity, amount, quality, or force <depression of autonomic function> <depression of red blood cells>

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a division or portion of a pool or whole

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