Definition of approximant noun from the Oxford Advanced American Dictionary

     

    approximant

     noun
    noun
    NAmE//əˈprɑksəmənt//
     
     
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  1. 1(phonetics) a speech sound made by bringing the parts of the mouth that produce speech close together but not actually touching, for example/r/ and/w/ in right and wet in many accents of English
  2. 2(mathematics) a solution that is close to but not exactly the solution of a problem
See the Oxford Advanced Learner's Dictionary entry: approximant