detention center
US /dɪˈten.ʃən ˌsen.tər/
UK /dɪˈten.ʃən ˌsen.tər/
1.
a place where people are held, usually temporarily, without trial, especially immigrants or asylum seekers
:
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The immigrants were sent to a detention center while their cases were reviewed.
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Human rights organizations have raised concerns about conditions in the detention center.