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English definition of “purify”

purify

verb [T] uk   /ˈpjʊə.rɪ.faɪ/ us    /ˈpjʊr-/

purify verb [T] (NOT MIXED)

to remove bad substances from something to make it pure: Plants help to purify the air. One of the functions of the kidneys is to purify the blood. water-purifying tablets

purify verb [T] (MORALLY GOOD)

to remove immoral thoughts or acts from something: One of the main teachings of Buddhism is that you should try to purify your mind.
(Definition of purify from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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