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:
More examples
- My dad's such a cheapskate that he cuts his hair himself.
- She eased the key into the lock, anxious not to wake anyone.
- If the lock has frozen up, try lubricating it with oil.
- If the door won't open, try jiggling the key in the lock.
- I could see at once that the lock had been tampered with.
Thesaurus: synonyms and related words
Building: locks & locksmithing
- bolt
- catch
- combination
- deadbolt
- deadlock
- fastener
- fastening
- hasp
- key
- key ring
- keycard
- keyhole
- latch
- locksmith
- master key
- mortise lock
- padlock
- pass key
- skeleton key
- Yale lock
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
Thesaurus: synonyms and related words
Parts of watercourses
- artesian well
- basin
- confluence
- delta
- drainage basin
- estuary
- firth
- geyser
- head
- lock-keeper
- meander
- midstream
- mooring
- mouth
- reach
- spring
- towpath
- tributary
- water table
- weir
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lock noun (DEFINITE EVENT)
[ C ] US informal something that is certain to happen:
Thesaurus: synonyms and related words
Certainty
- (as) clear as day idiom
- (as) sure as eggs is eggs idiom
- and that's flat! idiom
- assured
- assuredly
- bet
- consider it done idiom
- cut and dried
- decided
- decidedly
- definite
- dispute
- doubt
- mistake
- natch
- pronounced
- proof positive
- seal
- set/put the seal on sth idiom
- shadow
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lock noun (HAIR)
[ C ] a small group of hairs, especially a curl:
the hair on someone's head:
Thesaurus: synonyms and related words
Hair
- -haired
- a full, good, thick, etc. head of hair idiom
- bald patch
- balding
- beard
- crinkle
- curl
- curly
- hairpiece
- hairy
- hirsute
- plica
- pube
- receding hairline
- rug
- tache
- toupée
- tresses
- unshaven
- wisp
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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:
Thesaurus: synonyms and related words
On the road: driving & operating road vehicles
- aquaplaning
- back sth up
- boxed in
- bump start
- bus driver
- car seat
- carve
- corner
- dip
- driver
- driving
- foot
- hold the road idiom
- manoeuvring
- motor
- motorist
- mph
- pull away
- scorch
- turning circle
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lock noun (HOLD)
[ C ] a way of holding someone that you are fighting against so that they cannot move:
Thesaurus: synonyms and related words
Fighting sports
- all-in wrestling
- arm-wrestling
- bantamweight
- black belt
- body blow
- flyweight
- foil
- gumshield
- heavyweight
- jab
- jiujitsu
- knockout
- left-hander
- pugilistic
- punch-drunk
- punching bag
- rope
- roundhouse kick
- sabre
- wrestler
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Idiom(s)
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:
B1 [ I or T ] to fasten something with a key, or be fastened with a key:
More examples
- Oh, and don't forget to lock the back door.
- Some prize idiot forgot to lock the door.
- "Come on, hurry up!" "I'll just/only be a second - I've got to lock the back door."
- If you don't lock your doors and windows, you'll be a sitting target for burglars.
- I'd only gone a few steps down the road when I realized I'd forgotten to lock the door.
Thesaurus: synonyms and related words
Locking and bolting
- bar
- batten
- bolt
- handcuff
- latch
- lock (sth) up
- lock sb in
- lock sb out
- lock sth away
- lockable
- love lock
- manacle
- padlock
- shut
- shut sth away
- under lock and key idiom
lock verb (BECOME FIXED)
[ I ] to become fixed in one position:
Thesaurus: synonyms and related words
Fastening and tying
- anchor
- attach
- be locked together idiom
- board sth up
- bolt
- bound
- bow 1
- buckle
- buckle up
- hobble
- ligature
- mount
- nail
- put sth up
- reef knot
- rivet
- rope
- twist tie
- tying
- yoke
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