B1 [ C ] a device that prevents something such as a door from being opened and can only be opened with a key锁,门锁
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.
[ 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水闸,船闸
[ C ] US informal something that is certain to happen一定会发生的事件
[ C ] a small group of hairs, especially a curl(尤指卷发的)一股,一缕
[ U ] UK the amount a road vehicle's front wheels can be turned from one side to the other by turning its steering wheel前轮转向角度
[ C ] a way of holding someone that you are fighting against so that they cannot move锁住(对手),使(对手)动弹不得
B2 [ T usually + adv/prep ] to put something in a safe place and fasten the lock妥善保管,妥善保藏
B1 [ I or T ] to fasten something with a key, or be fastened with a key锁,上锁
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.
[ I ] to become fixed in one position锁定,锁住
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