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Definition of KO verb from the Oxford Advanced Learner's Dictionary

KO

verb
 
/ˌkeɪ ˈəʊ/
 
/ˌkeɪ ˈəʊ/
Verb Forms
present simple I / you / we / they KO
 
/ˌkeɪ ˈəʊ/
 
/ˌkeɪ ˈəʊ/
he / she / it KO's
 
/ˌkeɪ ˈəʊz/
 
/ˌkeɪ ˈəʊz/
past simple KO'd
 
/ˌkeɪ ˈəʊd/
 
/ˌkeɪ ˈəʊd/
past participle KO'd
 
/ˌkeɪ ˈəʊd/
 
/ˌkeɪ ˈəʊd/
-ing form KO'ing
 
/ˌkeɪ ˈəʊɪŋ/
 
/ˌkeɪ ˈəʊɪŋ/
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  1. KO somebody (in boxing) to hit an opponent hard so that they fall to the ground and cannot get up and therefore lose the fight (the abbreviation for knockout)
    • He got KO'd in the first round of his comeback fight.
    • (figurative) I was completely KO'd by Covid.
    Topics Sports: other sportsc2
    Word Origin1920s: abbreviation.

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