Lock

a restraint incorporated into the ignition switch to prevent the use of a vehicle by persons who do not have the key

enclosure consisting of a section of canal that can be closed to control the water level; used to raise or lower vessels that pass through it

a strand or cluster of hair

a fastener fitted to a door or drawer to keep it firmly closed

a mechanism that detonates the charge of a gun

any wrestling hold in which some part of the opponent's body is twisted or pressured

place in a place where something cannot be removed or someone cannot escape

hold in a locking position

become engaged or intermeshed with one another

fasten with a lock

become rigid or immoveable

hold fast (in a certain state)

keep engaged

build locks in order to facilitate the navigation of vessels

pass by means through a lock in a waterway