Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “knockout”

See all translations

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

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?
Add Cambridge dictionaries to your browser to your website

Definitions of “knockout” in other dictionaries

Word of the Day

illusion

an idea or belief that is not true

Word of the Day

Lies, lies, lies!

by Kate Woodford,
February 25, 2015
​​​ According to sociologists (=people who study the relationships between people living in groups), we are good at lying. As a species, we have developed a remarkable ability to deceive each other (= persuade each other that something false is true). Being able to say things that are not true can help with

Read More 

showrooming noun

February 23, 2015
the activity of examining a product in a physical store and then making the purchase with an online retailer Amazon’s new smartphone is specifically designed to make showrooming fast and easy.

Read More