prison
/ˈprɪzn; `prɪzn/ n
1 [C]
(a) place where people are kept locked up as a punishment for crimes they have committed or while awaiting trial 监狱; 看守所
The prisons are overcrowded. 监狱人满为患.
A modern prison has replaced the Victorian one. 一所现代化的监狱取代了那所维多利亚时代的监狱.
[attrib 作定语]
the prison population, ie the total number of prisoners in a country 监押人数（一个国家的囚犯总数）.
(b) (derog 贬) place from which sb cannot escape 某人无法逃脱的地方; 牢笼
Now that he was disabled, his house had become a prison to him. 因为他残废了, 他的房子就成了他的牢笼.
(fig 比喻) the prison of one's mind 思想上的束缚.
2 [U] being kept in a prison, esp as a punishment for crime; imprisonment 被监禁; （尤指）服刑; 坐牢
She's gone to/is in prison. 她已入狱[在狱中].
escape from, be released from, come out of prison 越狱、 释放、 出狱
He was sent to prison for five years. 他判了五年监禁.
Does prison do anything to prevent crime? 采取关押方法对制止犯罪有作用吗? =>Usage at school1 用法见 school1.