Definition of purifier noun from the Oxford Advanced Learner's Dictionary

 

purifier

 noun
noun
BrE BrE//ˈpjʊərɪfaɪə(r)//
 
; NAmE NAmE//ˈpjʊrɪfaɪər//
 
 
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a device that removes substances that are dirty, harmful or not wanted an air/water purifier
See the Oxford Advanced American Dictionary entry: purifier