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 (kā-ō′, kā′ō′)
n. pl. kay·os Sports
A knockout in boxing.
tr.v. kay·oed, kay·o·ing, kay·os
1. Sports To knock out.
2. Slang To put out of commission.

[Pronunciation of KO.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.kayoed - knocked unconscious by a heavy blow
unconscious - not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead; "lay unconscious on the floor"