Depression

Depression may refer to:
* Clinical depression, a medical condition identified by clusters of symptoms such as markedly-decreased mood, motivation, interest, energy levels, etc.
* Depression (mood), an everyday term for a sad or low mood or the loss of pleasure.
* Depression (geology), a sunken geological formation.
* Depression (economics), a longer-lasting and more severe economic downturn than a recession.
** The Great Depression, a severe economic recession in the 1930s.
* Depression (meteorology), an area of low atmospheric pressure associated with cyclones and weather fronts.
* Depression (physiology), a lowering, in particular a reduction in a particular biological variable or the function of an organ, contrasted to elevation.