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English definition of “boil (sth) down”

boil (sth) down

verb uk phrasal verb with boil   /bɔɪl/ us  
to heat a liquid or food so that part of it is turned into gas and its amount is reduced, or to be reduced in this wayPhysical and chemical processes
(Definition of boil (sth) down phrasal verb, verb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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