KO

[[t]ke͟ɪ o͟ʊ[/t]]

KO's, KO'd

1) N-COUNT KO is an abbreviation for knockout.

34 of his wins were KO's.

2) VERB To KO someone means to hit them so hard that they become unconscious. [INFORMAL]

[V n] He KO'd Nathan Mann in the third round.