The meaning of KNOCKOUT is the act of knocking out : the condition of being knocked out. How to use knockout in a sentence.

A knockout (abbreviated to KO or K.O.) is a fight-ending, winning criterion in several full-contact combat sports, such as boxing, kickboxing, Muay Thai, mixed martial arts, karate, some forms …

an act or instance of knocking out. the state or fact of being knocked out. a knockout blow. Informal., a person or thing overwhelmingly attractive, appealing, or successful.

knock•out (ˈnɒkˌaʊt) n. 1. an act or instance of knocking out. 2. the state or fact of being knocked out. 3. a knockout blow. 4. Informal. a person or thing overwhelmingly attractive, appealing, or …

If you describe someone or something as a knockout, you think that they are extremely attractive or impressive.

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 2025 PFL World Tournament Finals concluded tonight at Seminole Hard Rock Hotel & Casino in Hollywood, Florida, with Tournament Champions being crowned in the Heavyweight, …

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Definition of knockout noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Players can knock each other' s basketballs with their own ball. This can only be done when the ball is in the air (not in another player's hands) and ALL players agree to this rule before playing.