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Depression may refer to:

Mental health

• Depression (mood), a state of low mood and aversion to activity
• Mood disorders characterized by depression are commonly referred to as simply depression, including:
  • Major depressive disorder, also known as clinical depression
  • Bipolar disorder, also known as manic depression
  • Dysthymia, also known as persistent depressive disorder

Economics

• Economic depression, a sustained, long-term downturn in economic activity in one or more economies
  • Great Depression, a severe economic depression during the 1930s, commonly referred to as simply the Depression
  • Long Depression, an economic depression during 1873–96, known at the time as the Great Depression

Biology

• Depression (kinesiology), an anatomical term of motion, refers to downward movement, the opposite of elevation
• Depression (physiology), a reduction in a biological variable or the function of an organ
• Central nervous system depression, physiological depression of the central nervous system that can result in loss of consciousness

Earth science

• Depression (geology), a landform sunken or depressed below the surrounding area
• Depression (weather), an area of low atmospheric pressure characterized by rain and unstable weather

• Disambiguation pages