alternative forms: gaol] This jail i count the house of liberty. (Milton) jail bird, a prisoner; one who has been confined in prison. Jail delivery, the release of prisoners from jail, either legally or by violence. Jail delivery commission. See gaol.
(Science: medicine) jail fever, typhus fever, or a disease resembling it, generated in jails and other places crowded with people; called also hospital fever, and ship fever. Jail liberties, or jail limits, a space or district around a jail within which an imprisoned debtor was, on certain conditions, allowed to go at large. Jail lock, a peculiar form of padlock; called also Scandinavian lock.