de‧pres‧sion W3 AC / dɪpreʃ ə n / 名词

1 [可数和不可数名词]

a) a medical condition that makes you very unhappy and anxious and often prevents you from living a normal life :

women who suffer from post-natal depression (= that sometimes happens after the birth of a baby )

b) a feeling of sadness that makes you think there is no hope for the future :

Lucy’s mood was one of deep depression .

2 the (Great) Depression the period during the 1930s when there was not much business activity and not many jobs

3 [可数和不可数名词] a long period during which there is very little business activity and a lot of people do not have jobs → recession :

the devastating effects of economic depression

4 [可数名词] a part of a surface that is lower than the other parts :

depressions in the ground

5 [可数名词] technical a mass of air under low pressure, that usually causes rain