Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “knockout”


noun [C]     /ˈnɒkaʊt/
in boxing, a hard hit that makes a player unconsciousFighting sportsCompetitions, and parts of competitions
(Definition of knockout noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “knockout” in other dictionaries

Word of the Day


something that you do to prepare yourself for an activity, especially gentle exercises before a physical activity

Word of the Day


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