Nouns

(n)locka fastener fitted to a door or drawer to keep it firmly closed
(n)locka strand or cluster of hair
(n)locka mechanism that detonates the charge of a gun
(n)lock, lock chamberenclosure 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
(n)lock, ignition locka restraint incorporated into the ignition switch to prevent the use of a vehicle by persons who do not have the key
(n)lockany wrestling hold in which some part of the opponent's body is twisted or pressured

Verbs

(v)lockfasten with a lock“lock the bike to the fence”
(v)engage, mesh, lock, operatekeep engaged“engaged the gears”
(v)lockbecome rigid or immoveable“The therapist noticed that the patient's knees tended to lock in this exercise”
(v)lock, interlock, interlacehold in a locking position“He locked his hands around her neck”
(v)interlock, lockbecome engaged or intermeshed with one another“They were locked in embrace”
(v)lockhold fast (in a certain state)“He was locked in a laughing fit”
(v)lock in, lock away, lock, put away, shut up, shut away, lock upplace in a place where something cannot be removed or someone cannot escape“The parents locked her daughter up for the weekend”, “She locked her jewels in the safe”
(v)lockpass by means through a lock in a waterway
(v)lockbuild locks in order to facilitate the navigation of vessels