<p><strong>Noun</strong></p><ul><li>A person who has charge of the keys of a prison; jailer.</li></ul><p><strong>Adjective</strong></p><ul><li>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.</li><li>Fully equipped; ready to go into operation: a turnkey business.</li></ul>