Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “knock”

knock

noun [C]
 
 
/nɒk/
NOISE a sudden short noise made when something or someone hits a surface: a knock at/on the doorSounds made by objects, movement or impact
HIT a hit, sometimes causing damage or injury: a knock on the headHitting against objects accidentally and colliding
(Definition of knock noun from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Definitions of “knock” in other dictionaries

Word of the Day

innovate

to introduce changes and new ideas

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