Brig

n.	1.	A bridge.
	1.	(Naut.) A two-masted, square-rigged vessel. Hermaphrodite brig a two-masted vessel square-rigged forward and schooner-rigged aft. See Illustration in Appendix.
	1.	(Nav.) On a United States man-of-war, the prison or place of confinement for offenders.

Noun	1.	brig - two-masted sailing vessel square-rigged on both masts
	2.	brig - a penal institution (especially on board a ship)

POW camp, bastille, black hole, borstal, borstal institution, bridewell, calaboose, can, cell, clink, concentration camp, condemned cell, cooler, death cell, death house, death row, detention camp, federal prison, forced-labor camp, gaol, guardhouse, guardroom, house of correction, house of detention, industrial school, internment camp, jail, jailhouse, keep, labor camp, lockup, maximum-security prison, minimum-security prison, oubliette, pen, penal colony, penal institution, penal settlement, penitentiary, prison, prison camp, prisonhouse, reform school, reformatory, sponging house, state prison, stockade, the hole, tollbooth, training school