Turnkey /(tûrn"kē`)/

pl. Turnkeys ((tûr"kēz`))

1. A person who has charge of the keys of a prison, for opening and fastening the doors; a warder.
2. An instrument with a hinged claw, -- used for extracting teeth with a twist. (Dentistry)

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.