Turnkey

n.	1.	A person who has charge of the keys of a prison, for opening and fastening the doors; a warder.
	2.	(Dentistry) An instrument with a hinged claw, - used for extracting teeth with a twist.
a.	1.	Of or pertaining to a building, complex device, system, or industrial installation which is sold by a contractor only after it is ready for immediate occupation or use; fully functional and ready for use; - used of complex systems of a type which often require preparation or installation by the user before being capable of functioning as intended; as, a turnkey ethylene production plant; a turnkey apartment building.

Noun

1.

turnkey - someone who guards prisoners Synonyms: gaoler, jailer, jailor, prison guard, screw

TURNKEY. A person under the superintendence of a jailor, whose employment is to open and fasten the prison doors and to prevent the prisoners from escaping.
     2. It is his duty to use due diligence, and he may be punished for gross neglect or willful misconduct in permitting prisoners to escape.

gaoler, jailer, jailor, keeper, law officer, lawman, peace officer, prison guard, screw