LOCK, to secure by means of a mechanical fastening device [v]
A number of interlocked or jammed items
A person or thing that is certain to succeed; a certainty
(in wrestling and martial arts) A hold that prevents an opponent from moving a limb
A short confined section of a canal or other waterway in which the water level can be changed by the use of gates and sluices, used for raising and lowering vessels between two gates
A mechanism for exploding the charge of a gun
An airlock
A mechanism for keeping a door, lid, etc., fastened, typically operated only by a key of a particular form
A similar device used to prevent the operation or movement of a vehicle or other machine