Added 9 October 2026
knockout
/ˈnɒk.aʊt/ noun
noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about knockout at Wordnik → Where our words come from →
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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.
- The deactivation of anything.
-
Something wildly popular, entertaining, or funny.
If you've ever had a sack race, you know it's a real knockout for kids and adults alike.
adjective
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Rendering someone unconscious.
He delivered a knockout blow.
-
Amazing; gorgeous; beautiful.
You should have seen her knockout eyes.
- Designating an organism in which a particular gene has been removed or deactivated.
Origin
Deverbal from knock out.
From Wiktionary, via Kaikki.org (CC BY-SA)