depression
/dɪˈpreʃən/noun
mass noun
1
- severe despondency and dejection, typically felt over a period of time and accompanied by feelings of hopelessness and inadequacy沮丧, 抑郁。
1.1
- Medicine a condition of mental disturbance characterized by such feelings to a greater degree than seems warranted by the external circumstances, typically with lack of energy and difficulty in maintaining concentration or interest in life【医】抑郁症：
clinical depression.
临床抑郁症。
1.2
- a long and severe recession in an economy or market萧条：
the depression in the housing market
房产市场的萧条。
1.3
- （the Depression或the Great Depression）the financial and industrial slump of 1929 and subsequent years（1929年及随后几年的）大萧条。
2
- the lowering or reducing of something降低, 减少：
the depression of prices
价格的降低。
2.1
- the action of pressing down on something按下, 推压：
depression of the plunger delivers two units of insulin.
推压注射器柱塞注入两个单位的胰岛素。
2.2
- count noun a sunken place or hollow on a surface凹面, 低凹处：
the original shallow depressions were slowly converted to creeks.
原来的浅浅的低凹处慢慢变成了一条条小溪。
2.3
- Astronomy & Geography the angular distance of an object below the horizon or a horizontal plane【天文, 地理】俯角, 俯视角。
2.4
- count noun Meteorology a region of lower atmospheric pressure, especially a cyclonic weather system【气象】低（气）压区（尤指旋风系统）。
词源
late Middle English: from Latin depressio（n-）, from deprimere 'press down' （see DEPRESS）.