(n.) A place where persons under arrest are temporarily locked up; a watchhouse.

POW camp bastille black hole borstal borstal institution bridewell brig caging calaboose can cell check clink concentration camp condemned cell confinement constraint cooler coop death cell death house death row detention camp federal prison forced-labor camp gaol guardhouse hoosegow house of correction house of detention impoundment industrial school internment camp jail jailhouse jug keep labor camp maximum-security prison minimum-security prison oubliette pen penal colony penal institution penal settlement penitentiary penning pokey prison prison camp prisonhouse reform school reformatory restraint restriction sponging house state prison stockade the hole tollbooth training school