The action or an act of overlifting something.
Originally: the process in a lock by which a bolt is secured when one of the tumblers is overlifted.
Mid 19th century. From overlift.
To lift too high; to raise beyond the proper point. Chiefly used with reference to a tumbler or detector in a lock.
Mid 19th century; earliest use found in John Holland (1794–1872), poet and writer. From over- + lift.