lock Definition in Cambridge British English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Definition of "lock" - British English Dictionary

See all translations

locknoun

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.
See also
More examples

lock noun (WATER)

[C] a length of water with gates at each 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 (DEFINITE EVENT)

[C] US informal something that is certain to happen: She's a lock for promotion this year.

lock noun (HAIR)

[C] a small group of hairs, especially a curl: There is a lock of Napoleon's hair in the display cabinet.locks [plural] literary the hair on someone's head: curly locks flowing golden locks

lock noun (WHEELS)

[U] UK the amount a road vehicle's front wheels can be turned from one side to the other by turning its steering wheel : You need it on full lock (= with the wheel turned as much as possible).

lock noun (HOLD)

[C] a way of holding someone that you are fighting against so that they cannot move: The smaller wrestler held his opponent in a full body lock.

lockverb

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.
More examples

lock verb (BECOME FIXED)

[I] to become fixed in one position: I tried to start moving but the wheels had locked.
(Definition of lock from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of lock?
Add Cambridge dictionaries to your browser to your website

Definitions of “lock” in other dictionaries

Word of the Day
athlete

a person who is very good at sports or physical exercise, especially one who competes in organized events

Word of the Day

When’s dinner? (Words for different meals)
When’s dinner? (Words for different meals)
by Kate Woodford,
July 22, 2015
Here at ‘About Words’ we’re always happy to get ideas for posts that we could write. A reader of this blog recently asked for a post on the language of meals and we thought this an excellent idea. If you are reading this post and have an idea for a topic or

Read More 

exoskeleton noun
exoskeleton noun
July 27, 2015
a robotic device which goes around the legs and part of the body of a person who cannot walk and allows them to move independently and in an upright position The device, known as an exoskeleton, is strapped to the outside of a person’s limbs and can then be controlled by them.

Read More