Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

knock

 
 
/nɒk/ noun [C]

Definition

NOISE a sudden short noise made when something or someone hits a surface: a knock at/on the door
HIT when someone or something is hit, sometimes causing damage or injury: a knock on the head
(Definition of knock noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Word of the Day

be under a cloud

to not be trusted or popular because people think you have done something bad

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More