Synonyms of 'lockup'
A prison is a building where criminals are kept as punishment or where people accused of a crime are kept before their trial.
They released him from prison in 1990.
nick (British , slang)
calaboose (US , informal)
poky or pokey (US , Canadian , slang)
boob (Australian , slang)
Thesaurus for lockup from the Collins English Thesaurus
the act of locking up