jail n: a place of confinement for persons held in lawful custody
: such a place under the jurisdiction of a local government (as a county) for the confinement of persons awaiting trial or those convicted of minor crimes compare house of correction , house of detention , lockup , penitentiary , prison
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.