pris·on 
/ˈprɪzn̩/ noun
plural pris·ons /ˈprɪzn̩/ noun 1 : a building where people are kept as punishment for a crime or while they are waiting to go to court [count] ▪ a state/federal prison ▪ The state plans to build two more prisons. [noncount] ▪ He was in prison at the time. ▪ If caught, they're all going to prison. ▪ She was sent/sentenced to prison for robbery. ▪ He was released from prison. ▪ He's scheduled to get out of prison next month. — often used before another noun ▪ a prison cell ▪ a prison guard ▪ an investigation into prison conditions ▪ an overhaul of the prison system ▪ prison reform ▪ the prison population ▪ an eight-year prison sentence/term ▪ prison time [=the time someone spends in prison] synonyms 1jail 2 [count] : a place or situation from which you cannot escape
▪ Her marriage became a prison to her.
▪ Her marriage became a prison to her.
