1 [C,U] worry and pressure that is caused by having too much to deal with 精神压力；思想负担: He's been under a lot of stresssince his wife went into hospital. 自从妻子进医院后，他便承受着很大的压力。

2 [U] stress (on sth) the special attention that you give to sth because you think it is important 强调: We should put more stresson preventing crime. 我们应更加重视防止犯罪活动。

3 [C,U] (a) stress (on sth) the force that you put on a particular word or part of a word when you speak 重读；重音: In the word ‘dictionary’ the stress is on the first syllable, ‘dic’. dictionary这个词的重音在第一个音节dic。

4 [C,U] a physical force that may cause sth to bend or break （使物体弯曲或折断的）压力: Heavy lorries put too much stresson this bridge. 重型卡车使这座桥承受太大的压力。