Definition from Wiktionary, the free dictionary
- (law enforcement) An armed person working to provide order, security, discipline, punishment, and prevent escapes of prisoners in a jail that answers to a warden
1987, Arctos: Acta philologica fennica, page 29:
- During his services as a praetorian, Caesium Verus was twice promoted, first to tubicen (trumpeter), then to optio carceris (camp prisonguard): ordinatus tubicem item optio at carcarem factus est.
jailer — see jailer