Depression reference

IN TERMS OF DEPRESSION:
Psychology

* Depression (mood), a lack of positive affect
* Colloquially, Adjustment disorder with depressed mood, previously known as Reactive depression.
* Major depressive disorder a clinical diagnosis of a state of intense sadness
o Melancholic depression a sub-type of clinical depression characterized by an inability to feel pleasure combined with physical agitation, insomnia, or decreased appetite
o Atypical depression, a cyclical sub-type of clinical depression where sleep, feeding and perception of pleasure are normal but there is a feeling of lethargy
o Psychotic depression, a sub-type of clinical depression combined with psychotic or delusional perceptions
o Postnatal depression, clinical depression following childbirth
* Depression is the 4th stage of the Kübler-Ross model (commonly known as the "stages of dying").

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Physiology

* Depression (physiology), a reduction in a biological variable or the function of an organ
* Depression (kinesiology), an anatomical term of motion

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Other

* Depression (geology), a sunken landform
* In economics, a depression is an economic downturn more severe than a recession
o The Great Depression was a severe economic depression in the 1930s
* In meteorology, a depression is an area of low atmospheric pressure
* "Depress", a song by Eyehategod from the album In the Name of Suffering
* "Depression", a song by Black Flag from the album Damaged