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English definition of “filtration”

filtration

noun [U] uk   /fɪlˈtreɪ.ʃən/ us  
the act of passing a liquid or gas through a piece of equipment in order to remove solid pieces or other substances: a filtration unit/plant The technology exists to remove all of these contaminants through filtration.
(Definition of filtration from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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