bullpen, detention cell, detention centre(noun)

a large cell where prisoners (people awaiting trial or sentence or refugees or illegal immigrants) are confined together temporarily

detention centre(Noun)

A facility in which people are detained (held in custody); a jail.

detention centre(Noun)

An immigration detention facility; a facility in which people who have attempted to enter Australia without prior authorisation are detained, pending a decision on whether they are to be accepted as refugees or returned to their country of origin.

detention centre(Noun)

A concentration camp.