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English definition of “keep sth down”

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keep sth down

verb uk phrasal verb with keep   /kiːp/ (kept, kept) us  

(FOOD)

to be able to eat or drink something without vomiting: On the day after her operation she couldn't keep anything down.

(SIZE)

B2 to control the size or number of something and prevent it from increasing: We need to work hard to keep our prices down. I'm going to sleep, so will you try to keep the noise down?
(Definition of keep sth down from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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