lock

(noun) a fastener fitted to a door or drawer to keep it firmly closed.

(noun) a strand or cluster of hair. Synonyms: curl, ringlet, whorl.

(noun) a mechanism that detonates the charge of a gun.

(noun) 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. Synonyms: lock chamber.

(noun) a restraint incorporated into the ignition switch to prevent the use of a vehicle by persons who do not have the key. Synonyms: ignition lock.

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

(verb) fasten with a lock. Example: "Lock the bike to the fence."

(verb) keep engaged. Synonyms: engage, mesh, operate. Example: "Engaged the gears."

(verb) become rigid or immoveable. Example: "The therapist noticed that the patient's knees tended to lock in this exercise."

(verb) hold in a locking position. Synonyms: interlock, interlace. Example: "He locked his hands around her neck."

(verb) become engaged or intermeshed with one another. Synonyms: interlock. Example: "They were locked in embrace."

(verb) hold fast (in a certain state). Example: "He was locked in a laughing fit."

(verb) place in a place where something cannot be removed or someone cannot escape. Synonyms: lock in, lock away, put away, shut up, shut away, lock up. Examples: "The parents locked her daughter up for the weekend." "She locked her jewels in the safe."

(verb) pass by means through a lock in a waterway.

(verb) build locks in order to facilitate the navigation of vessels.