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Lock
[NOUN]5
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
6
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
Examples
1. Drug companies are locking horns in a legal battle over patents.
2. He locked the door before leaving the house.
3. I turned the key in the lock.
4. He turned the key in the lock.
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