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English definition of “ratchet sth down”

ratchet sth down

phrasal verb with ratchet     /ˈrætʃɪt/ verb
to reduce something in controlled stages over a period of time : The state plans to ratchet down greenhouse gas emissions by 25% within the next 10 years .
(Definition of ratchet sth down from the Cambridge Business English Dictionary © Cambridge University Press)
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