Nautical .

a two-masted vessel square-rigged on both masts.

(formerly, in the U.S. Navy) an armed brig-rigged or brigantine-rigged vessel.

the compartment of a ship where prisoners are confined.

a place of confinement or detention, esp. in the U.S. Navy or Marines; guardhouse.

noun

house of correction , keep , penitentiary , prison , boat , guardhouse , jail , ship , slammer , stockade , vessel