turnkey /ˈtɜːnˌkiː/

• 1. 

  N a keeper of the keys, esp in a prison; warder or jailer (监狱、病房、看守所中)管钥匙的人 [archaic]

• 2. 

  ADJ denoting a project, as in civil engineering, in which a single contractor has responsibility for the complete job from the start to the time of installation or occupancy (指土木工程项目)个人承包商有责任从安装或占有之使完成工作的