Pronunciation: (di-presh'un),[key] —n. 1. the act of depressing.
2. the state of being depressed.
3. a depressed or sunken place or part; an area lower than the surrounding surface.
4. sadness; gloom; dejection.
5. Psychiatry.a condition of general emotional dejection and withdrawal; sadness greater and more prolonged than that warranted by any objective reason. Cf. clinical depression. 6. dullness or inactivity, as of trade.
7. Econ.a period during which business, employment, and stock-market values decline severely or remain at a very low level of activity.
8. the Depression.See Great Depression. 9. Pathol.a low state of vital powers or functional activity.
10. Astron.the angular distance of a celestial body below the horizon; negative altitude.
11. Survey.the angle between the line from an observer or instrument to an object below either of them and a horizontal line.
12. Phys. Geog.an area completely or mostly surrounded by higher land, ordinarily having interior drainage and not conforming to the valley of a single stream.
13. Meteorol.an area of low atmospheric pressure.