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ENGLISH · A WORD WITH POSSIBILITIES

knockout.

The act of making one unconscious, or at least unable to come back on one's feet within a certain period of time; a TKO.

8 characters2 syllables approx.English language

Meaning & usage

noun/ˈnɒk.aʊt/UK/ˈnɑk.oʊt/General-American
  1. The act of making one unconscious, or at least unable to come back on one's feet within a certain period of time; a TKO.

    The boxer scored a knockout on his opponent.
  2. The deactivation of anything.

  3. Something wildly popular, entertaining, or funny.

    informal
    If you've ever had a sack race, you know it's a real knockout for kids and adults alike.
  4. A very attractive person, especially a beautiful woman.

    informal
  5. A partially punched opening meant for optional later removal.

    They left a knockout in the panel for running extra wires someday.
  6. The deactivation of a particular gene.

  7. A creature engineered with a particular gene deactivated.

  8. An event where a foreground color causes a background color not to print.

  9. A tournament in which a team or player must beat the opponent in order to progress to the next round.

    the knockout stages of the competition
  10. A simple game for two or more players, derived from basketball.

    uncountable
  11. A woman in Total Nonstop Action Wrestling.

    US · capitalized
  12. Ellipsis of knockout auction.

    abbreviation · alt-of · ellipsis
Where this word comes from

Deverbal from knock out.

adj/ˈnɒk.aʊt/UK/ˈnɑk.oʊt/General-American
  1. Rendering someone unconscious.

    not-comparable
    He delivered a knockout blow.
  2. Amazing; gorgeous; beautiful.

    not-comparable
    You should have seen her knockout eyes.
  3. Designating an organism in which a particular gene has been removed or deactivated.

    not-comparable
  4. Causing elimination from a competition.

    not-comparable
Where this word comes from

Deverbal from knock out.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.