Meaning of “lock” in the English Dictionary

"lock" in English

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uk /lɒk/ us /lɑːk/

lock noun (FASTENER)

B1 [ C ] a device that prevents something such as a door from being opened and can only be opened with a key:

I heard someone turn a key in the lock.
safety locks
Thieves got in by smashing the lock off the door.
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uk /lɒk/ us /lɑːk/

lock verb (MAKE SAFE)

B2 [ T usually + adv/prep ] to put something in a safe place and fasten the lock:

He locked the confidential documents in his filing cabinet.
You really should lock your car (up) or it'll get stolen.

B1 [ I or T ] to fasten something with a key, or be fastened with a key:

Don't forget to lock the door when you go out.
If you shut the door it will lock automatically.

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(Definition of “lock” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"lock" in American English

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locknoun [ C ]

us /lɑk/

lock noun [ C ] (DEVICE TO FASTEN)

a device that keeps something, such as a door or drawer, fastened, usually needing a key to open it

lock noun [ C ] (WATER)

a length of water with gates at either end where the level of water can be changed to allow boats to move between parts of a canal or river that are at different heights

lock noun [ C ] (HAIR)

a curl of hair, or a group of hairs

lockverb [ I/T ]

us /lɑk/

lock verb [ I/T ] (NOT ALLOW CHANGE)

to be or hold something in a position or condition where movement, escape, or change is not possible:

[ T ] They’re locked in a lawsuit with their former employer.
[ I ] The cars crashed and the bumpers locked, making it impossible to move.
[ M ] The bank won’t lock in our mortgage rate.

lock verb [ I/T ] (FASTEN)

If you lock something somewhere, you make it safe by putting it in a special place and fastening it closed with a lock:

[ T ] He locked the documents in his filing cabinet.

(Definition of “lock” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"lock" in Business English

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uk /lɒk/ us
lock horns (with sb)

to become involved in a disagreement or argument with someone:

My first test as a manager early in my career was locking horns with a union representative at a print factory.
lock horns (with sb) over sth The White House and Congress locked horns over how to cut the budget deficit.

(Definition of “lock” from the Cambridge Business English Dictionary © Cambridge University Press)