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OneKitly

KO

nounverbcommon in dialogue

To knock someone out; to render someone unconscious.

noun

  1. 1

    Variant of knock outAbbreviation of knock out.

  2. 2

    Variant of kick-offAbbreviation of kick-off (“the time or manner of start of play”).

Etymology

Initialism of knock out. Initialism of kick-off.

verb

  1. 1

    To knock someone out; to render someone unconscious.

    Joe KO'd the opposing boxer.

  2. 2

    To start play.

Forms

plural
KOs, KO's
past tense
KOed, KO'd, KO'ed
past participle
KOed, KO'd, KO'ed
present participle
KOing, KO'ing
third person singular
KOs, KO's
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).