knock to hit something so that it moves or breaks; to put somebody/​something into a particular state or position by hitting them/​it: Someone had knocked a ...

knock to hit something so that it moves or breaks; to put someone or something into a particular state or position by hitting them/it:Someone had knocked a hole ...

1the sound of someone hitting a door, window, etc. with their hand or with something hard to attract attention There was a knock on/at the door.

knock · ​. the sound of somebody hitting a door, window, etc. with their hand or with something hard to attract attention · ​. a sharp hit from something hard ...

There are ten meanings listed in OED's entry for the noun knock. See 'Meaning & use' for definitions, usage, and quotation evidence.

​causing other events to happen one after another in a series. The increase in the price of oil had a knock-on effect on the cost of many other goods.

used to say that something is in a place but you do not know exactly where knock somebody/something around (British English also knock somebody/something about)

​to prepare or make something quickly and without much effort. She knocked up a meal in ten minutes. See knock up in the Oxford Advanced American Dictionary ...

knock together · ​(informal) to make or complete something quickly and often not very well. I knocked some bookshelves together from old planks. Topics ...

knock off · ​(informal) to complete something quickly and without much effort. He knocks off three novels a year. · ​(British English, slang) to steal something ...