knock out phrasal verb ( see also ↑ knock )
1 . UNCONSCIOUS knock somebody ↔ out to make someone become unconscious or go to sleep:
The champion knocked Biggs out in the seventh round.
knock yourself out
His head hit a table as he fell and he knocked himself out.
The nurse gave me some medicine which totally knocked me out.
⇨ ↑ knockout 1 (1)
2 . DEFEAT knock somebody/something ↔ out to defeat a person or team in a competition so that they can no longer take part:
The German team were knocked out in the first round.
knock somebody/something out of something
He first hit the headlines when he knocked Becker out of the French Open Tournament.
⇨ ↑ knockout 1 (3)
3 . DESTROY knock something ↔ out to damage something so that it does not work:
The air raids were planned to knock out communications on the ground.
4 . ADMIRE knock somebody out informal if something knocks you out, it is very impressive and surprises you because it is so good:
She loved the movie. It knocked her out.
⇨ ↑ knockout 1 (2)
5 . PRODUCE knock something ↔ out informal to produce something easily and quickly:
Paul has been knocking out new songs for the album.
6 . knock yourself out informal to work very hard in order to do something well