Synonym: clasp, close, fasten, hook, latch, seal, shut. Antonym: unlock. Similar words: block, o'clock, local, locate, location, dock, sock, shock. Meaning: [lɑk /lɒk] 
n. 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. v. 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.
n. 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. v. 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. 
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31. The key turned in the lock with a loud metallic click.
32. Give away any food you have on hand, or lock it up and give the key to the neighbours.
33. For a car of this size the lock is excellent.
34. The lock was rusty, so we had to smash the door open.
35. He took a small key from his pocket and slowly inserted it into the lock.
36. This suitcase doesn't lock.
37. His hand shook slightly as he inserted the key into the lock.
38. Management has threatened to lock out the workforce if they do not accept the proposed changes in working methods.
39. She would keep any sensitive documents under lock and key.
40. He broke the lock with one stroke of the hammer.
41. I'll have to boot you out soon — I want to lock up.
42. The broken lock facilitated my entrance into the empty house.
43. The final thing she did before she left the house was to lock the door.
44. He inserted the key in the lock but could not open the door.
45. I bought another safety lock as an additional insurance against thieves.
45. Sentencedict.com try its best to gather and make good sentences.
46. Don't be discouraged; it's often the last key in the bunch that opens the lock.
47. He kept a lock of her hair as a memento.
48. Remember to put the chain on the door when you lock it.
49. Lock your bike to something immovable like a railing or lamp-post.
50. I fitted a new lock to ensure that the bicycle would not be stolen.
51. Some doors have locks which automatically lock the doors when we close them.
52. If the door won't open, try jiggling the key in the lock.
53. She screwed the lock into the door.
54. The blacksmith picked a lock with a pin.
55. The lock took with a click.
56. Leave the key in the lock.
57. Don't forget to lock up when you leave.
58. Squirt some oil in the lock.
59. He tapped in the code and the lock disengaged.
60. He sprang the lock open.