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English definition of “filter”

filter

verb [T] (REMOVE)    /ˈfɪl.tər/ US  /-t̬ɚ/
C2 to remove solids from liquids or gases, or to remove particular types of light, using special equipment: The water is filtered to remove any impurities. Devices in the two chimneys would filter (out) (= remove) radioactive dust.Removing and extractingSeparating and dividing
(Definition of filter verb (REMOVE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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