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

     

    mister

     noun
    noun
    BrE BrE//ˈmɪstə(r)//
     
    ; NAmE NAmE//ˈmɪstər//
     
     
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  1. 1Mister the full form, not often used in writing, of the abbreviation Mr
  2. 2(informal) used, especially by children, to address a man whose name they do not know Please, mister, can we have our ball back?
  3. Word Origin mid 16th cent.: weakened form of master in unstressed use before a name.
See the Oxford Advanced American Dictionary entry: mister