Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “knock”

knock

verb
 
 
/nɒk/
MAKE NOISE [I] B1 to make a noise by hitting something, especially a door, with your closed hand in order to attract someone's attention: There's someone knocking at/on the door. Please knock before entering.Hitting against objects accidentally and collidingSounds made by objects, movement or impact
HIT [T] B1 to hit something or someone and make them move or fall down: He accidentally knocked the vase off the table. I knocked over the mug. He was knocked unconscious by the blast.Hitting against objects accidentally and collidingHitting and beatingPunishing by causing pain
CRITICIZE [T] informal to criticize someone or something, often unfairly: She knocks every suggestion I make.Disapproving and criticizingDamaging reputation
→ See also beat/knock the (living) daylights out of sb, Knock it off!, knock sth back, knock sb down, knock sb/sth down, knock sth down, knock off, knock sth off (sth), knock sb out
(Definition of knock verb 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

hello stranger

said to a person that you know but have not seen for a long time

Word of the Day

Come on – you can do it! Phrasal verbs with ‘come’.

by Liz Walter​,
November 19, 2014
As part of an occasional series on the tricky subject of phrasal verbs, this blog looks at ones formed with the verb ‘come’. If you are reading this blog, I’m sure you already know come from, as it is one of the first things you learn in class: I come from Scotland/Spain.

Read More 

silver splicer noun

November 17, 2014
informal a person who marries in later life Newly retired and now newlywed – rise of the ‘silver splicers’ Reaching pension age becomes a trigger to tie the knot as baby-boomers begin to redefine retirement

Read More