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Definition of lexicon noun from the Oxford Advanced American Dictionary

     

    lexicon

     noun
    noun
    NAmE//ˈlɛksəˌkɑn//
     
     
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  1. 1the lexicon [singular] (linguistics) all the words and phrases used in a particular language or subject; all the words and phrases used and known by a particular person or group of people the lexicon of finance and economics
  2. 2[countable] a list of words on a particular subject or in a language in alphabetical order a lexicon of technical scientific terms
  3. 3[countable] a dictionary, especially one of an ancient language, such as Greek or Hebrew
See lexicon in the Oxford Advanced Learner's Dictionary
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