Yes, locks is a Scrabble word!

Verb

1. Fasten with a lock

2. Keep engaged

3. Become rigid or immoveable

4. Hold in a locking position

5. Become engaged or intermeshed with one another

6. Hold fast (in a certain state)

7. Place in a place where something cannot be removed or someone cannot escape

8. Pass by means through a lock in a waterway

9. Build locks in order to facilitate the navigation of vessels

Noun

1. A fastener fitted to a door or drawer to keep it firmly closed

2. A strand or cluster of hair

3. A mechanism that detonates the charge of a gun

4. 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

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

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