Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “knock sb out”

See all translations

knock sb out

verb uk phrasal verb with knock   /nɒk/ us    /nɑːk/

(MAKE UNCONSCIOUS)

B2 to hit someone so that they become unconscious: His opponent knocked him out with one punch.
See also

(MAKE SLEEP)

If a drug or alcohol knocks you out, it makes you go to sleep: The sleeping tablets knocked him out for 18 hours.

(DEFEAT)

B2 to defeat a person or a team in a competition so that they can no longer take part in it: The champion was unexpectedly knocked out (of the tournament) in the first round.

(IMPRESS)

old-fashioned slang to cause enjoyment or admiration in someone: We were all really knocked out by the film.
(Definition of knock sb out from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of knock sb out?
Add Cambridge dictionaries to your browser to your website

“knock sb out” in English

    Definitions of “knock sb out” in other dictionaries

    Word of the Day

    be in/out of luck

    to be able/unable to have or do what you want

    Word of the Day

    A certain je ne sais quoi: French words and phrases used in English

    by Liz Walter,
    January 21, 2015
    It is an odd irony that the more sophisticated your use of English is, the more likely you are to use French words and phrases. Or, to be more accurate, ones you know to be French – words such as ballet, au pair, abattoir, fiancé, café, and restaurant are so entrenched in

    Read More 

    micro pig noun

    January 26, 2015
    an extremely small pig, bred to be a pet Micro pigs have become popular pets recently, with famous owners including Victoria Beckham, Paris Hilton and Olympic diver, Tom Daley.

    Read More