American Dictionary

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Definition knock in American English

knock noun

[countable] noun
/nɑk/
1

the sound of someone knocking on a door

Example

There was a loud knock at the door.

1.1

a series of noises that an engine or machine makes when it is not working correctly

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2

an injury or damage caused by being knocked

Example

a nasty knock on the head

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2.1

an instance of knocking someone or something

Example

The watch is built to withstand the occasional knock.

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3

something bad or unpleasant that happens to someone

Example

Life is full of hard knocks.

Synonyms and related words
Definition knock in American English