[lok] 
| 1. | a device for securing a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a key, dial, etc. |
| 2. | a contrivance for fastening or securing something. |
| 3. | (in a firearm)
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| 4. | any device or part for stopping temporarily the motion of a mechanism. |
| 5. | an enclosed chamber in a canal, dam, etc., with gates at each end, for raising or lowering vessels from one level to another by admitting or releasing water. |
| 6. | an air lock or decompression chamber. |
| 7. | complete and unchallenged control; an unbreakable hold: The congresswoman has a lock on the senatorial nomination. |
| 8. | Slang. someone or something certain of success; sure thing: He's a lock to win the championship. |
| 9. | Wrestling. any of various holds, esp. a hold secured on the arm, leg, or head: leg lock. |
| 10. | Horology. (in an escapement) the overlap between a tooth of an escape wheel and the surface of the pallet locking it. |
| 11. | Metalworking. a projection or recession in the mating face of a forging die. |
| 12. | to fasten or secure (a door, window, building, etc.) by the operation of a lock or locks. |
| 13. | to shut in a place fastened by a lock or locks, as for security or restraint. |
| 14. | to make fast or immovable by or as if by a lock: He locked the steering wheel on his car. |
| 15. | to make fast or immovable, as by engaging parts: to lock the wheels of a wagon. |
| 16. | to join or unite firmly by interlinking or intertwining: to lock arms. |
| 17. | to hold fast in an embrace: She was locked in his arms. |
| 18. | to move (a ship) by means of a lock or locks, as in a canal (often fol. by through, in, out, down, or up). |
| 19. | to furnish with locks, as a canal. |
| 20. | to become locked: This door locks with a key. |
| 21. | to become fastened, fixed, or interlocked: gears that lock into place. |
| 22. | to go or pass by means of a lock or locks, as a vessel. |
| 23. | to construct locks in waterways. |
| 24. | lock in,
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| 25. | lock off, to enclose (a waterway) with a lock. |
| 26. | lock on, to track or follow a target or object automatically by radar or other electronic means. |
| 27. | lock out,
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| 28. | lock up,
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| 29. | lock horns, to come into conflict; clash: to lock horns with a political opponent. |
| 30. | lock, stock, and barrel, completely; entirely; including every part, item, or facet, no matter how small or insignificant: We bought the whole business, lock, stock, and barrel. |
| 31. | under lock and key, securely locked up: The documents were under lock and key. |
