Bedeutung von “knock someone out” im Essential American English Dictionary

knock someone out

phrasal verb with knock us /nɑk/ verb

to make someone become unconscious, usually by hitting him or her on the head:

He was knocked out halfway through the fight.

to defeat a person or team in a competition so that the person or team cannot take part any more:

Our team was knocked out in the semifinals.

(Definition von “knock someone out” aus dem Webster's Essential Mini Dictionary © Cambridge University Press)