n. [ See Jail. ] A place of confinement, especially for minor offenses or provisional imprisonment; a jail. [ Preferably, and in the United States usually, written jail. ] [ 1913 Webster ]

Commission of general gaol delivery, an authority conferred upon judges and others included in it, for trying and delivering every prisoner in jail when the judges, upon their circuit, arrive at the place for holding court, and for discharging any whom the grand jury fail to indict. [ Eng. ] --
Gaol delivery. (Law) See Jail delivery, under Jail. [ 1913 Webster ]

n. a person serving a prison sentence; a jail bird. [ Chiefly Brit. ]
Syn. -- convict, inmate, jailbird, jail bird. [ WordNet 1.5 ]

n. an escape from jail; same as jailbreak. [ Chiefly Brit. ]
Syn. -- break, breakout, jailbreak, prisonbreak, prison-breaking. [ WordNet 1.5 ]

n. The keeper of a jail. Same as Jailer. [ 1913 Webster ]