1

knockout

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noun knock·out \ˈnäk-ˌau̇t\

Definition of knockout

  1. 1a :  the act of knocking out :  the condition of being knocked outb (1) :  the termination of a boxing match when one boxer has been knocked down and is unable to rise and resume boxing within a specified time (2) :  technical knockoutc :  a blow that knocks out an opponent

  2. 2 :  a sensationally striking, appealing, or attractive person or thing

Recent Examples of knockout from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'knockout'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of knockout

1887


2

knockout

adjective knock·out

Definition of knockout

  1. 1 :  causing a knockout a knockout blow

  2. 2 :  sensationally striking, appealing, or attractive a knockout dress

  3. 3 :  having all or part of a gene eliminated or inactivated by genetic engineering knockout mice predisposed to diabetes mellitus

First Known Use of knockout

1818


Medical Dictionary

knockout

play
adjective knock·out \ˈnäk-ˌau̇t\

Medical Definition of knockout

  1. :  having all or part of a gene eliminated or inactivated by genetic engineering knockout mice predisposed to diabetes mellitus serve as animal models in the study of human diabetes



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