Definitions
1.nounIn psychotherapy and psychiatry, a state of mind producing serious, long-term lowering of enjoyment of life or inability to visualize a happy future."I used to suffer from depression, but now I'm mostly content with my life."
2.nounAn area that is lower in topography than its surroundings.
3.nounIn psychotherapy and psychiatry, a period of unhappiness or low morale which lasts longer than several weeks and may include ideation of self-inflicted injury or suicide.
4.nounAn area of lowered air pressure that generally brings moist weather, sometimes promoting hurricanes and tornadoes.
5.nounA period of major economic contraction.
6.nounFour consecutive quarters of negative, real GDP growth. See NBER."The Great Depression was the worst financial event in US history."
7.nounThe act of lowering or pressing something down."Depression of the lever starts the machine."
8.nounA lowering, in particular a reduction in a particular biological variable or the function of an organ, in contrast to elevation.