- a person who has charge of the keys of a prison; jailer.
- of, relating to, or resulting from an arrangement under which a private contractor designs and constructs a project, building, etc., for sale when completely ready for occupancy or operation: turn-key housing, turnkey contract.
- fully equipped; ready to go into operation: a turnkey business.
- a keeper of the keys, esp in a prison; warder or jailer
- 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
