prison             
noun uk/ˈprɪz.ən/ us/ˈprɪz.ən/
B1 [ C or U ]监狱 
a building where criminals are forced to live as a punishment
  Conditions in the prison are said to be appalling. 监狱里的条件据说糟透了。 
 He's spent a lot of time in prison. 他坐了很长时间的牢。 
 She went to/was sent to prison for six months. 她入狱6个月。 
 It was a maximum-security prison (= intended to be especially difficult to escape from). 这是一所戒备森严的监狱。 
 They should put him in prison and throw away the key! 他们应该把他关进监狱,永远也别放出来! 
 a prison cell/sentence/guard 牢房/徒刑/狱监 
 See also: penitentiary
  [ U ]监禁,关押;关押制度 
the system of keeping people in prisons
  the prison system 监狱制度 
 Do you think prison works? 你认为监禁有用吗? 
 Prison (= the time he had spent in prison) hadn't changed him at all. 服刑丝毫没有让他改变。 
  [ C ]樊笼;禁锢 
a situation or relationship from which it is difficult to escape
  She felt that her marriage had become a prison. 她觉得自己的婚姻变成了牢笼。 
 - More examples
 - He was sent to prison for a crime that he didn't commit.
 - He was sent to a high-security prison.
 - If you spend any time in prison, you're labelled as a criminal for the rest of your life.
 - The release from prison of two of the terrorists has provoked a public outcry.
 - He served a year in prison and was then let out on probation.