Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “knockout”

knockout

noun [C] uk   /ˈnɒk.aʊt/ us    /ˈnɑːk-/

knockout noun [C] (UNCONSCIOUS)

in boxing, the act of hitting the other fighter so that they fall to the ground and are unable to get up again within ten seconds: a knockout punch/blow
See also

knockout noun [C] (COMPETITION)

(US elimination tournament) a competition in which only the winners of each stage play in the next stage, until one competitor or team is the final winner: The tournament is a straight knockout. a knockout competition/championship/match

knockout noun [C] (ATTRACTIVE)

informal a person or thing that looks, sounds, etc. extremely attractive: Your sister's a real knockout!

knockout

adjective uk   /ˈnɒk.aʊt/ us    /ˈnɑːk-/ informal
extremely attractive: She looked knockout in that dress.
(Definition of knockout from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of knockout?
Browse related topics

You are looking at an entry to do with Accidents and disasters, but you might be interested in these topics from the Happenings and events topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “knockout” in other dictionaries

Word of the Day

fairy

an imaginary creature with magic powers, usually represented as a very small person with wings

Word of the Day

What’s that lovely smell?

by Kate Woodford​,
October 29, 2014
As adult humans, we can distinguish about 10,000 different smells. It’s no wonder, then, that we have so many words and expressions to describe them. This week we’re taking a look at those smell words – words that describe good smells and words that describe bad smells. Most smell words are either

Read More 

high-frequency trading noun

October 27, 2014
a type of stock market trading that uses very complex technology to trade extremely quickly, often making tiny profits which nevertheless add up to substantial sums Lewis’s book, Flash Boys, is driving a huge amount of attention toward the topic of high frequency trading, and it has rekindled some of

Read More