detention centre
noun
- an institution where people are held in detention for short periods, in particular illegal immigrants, refugees, people awaiting trial or sentence, or (formerly in the UK) young offenders（尤指对非法移民、难民、候审人员或未决犯进行短期关押的）拘留中心; （英国旧时关押青少年罪犯的）感化中心。