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English definition of “knock sb out”

knock sb out

(MAKE SLEEP) phrasal verb with knock     /nɒk/ US  /nɑːk/ verb
If a drug or alcohol knocks you out, it makes you go to sleep: The sleeping tablets knocked him out for 18 hours.Administering drugs and medicines
(Definition of knock sb out (MAKE SLEEP) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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