n. A place where persons are confined, or restrained of personal liberty; hence, a place or state o� confinement, restraint, or safe custody.n. Specifically, a building for the safe custody or confinement of criminals and others committed by lawful authority.v. To imprison; to shut up in, or as in, a prison; to confine; to restrain from liberty.v. To bind (together); to enchain.