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

impurity

noun
 
/ɪmˈpjʊərəti/
 
/ɪmˈpjʊrəti/
(plural impurities)
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  1. [countable] a substance that is present in small amounts in another substance, making it dirty or of poor quality
    • A filter will remove most impurities found in water.
    • The substance is free of impurities.
    • The water contains impurities which make it unsuitable for drinking.
  2. [uncountable] the state of being dirty or not pure opposite purity
  3. Word Originlate Middle English: from French impurite or Latin impuritas, from impurus, from in- ‘not’ + purus ‘pure’.
See impurity in the Oxford Advanced American DictionarySee impurity in the Oxford Learner's Dictionary of Academic English
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adjective
 
 
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