Definition of mister noun from the Oxford Advanced American Dictionary

     

    mister

     noun
    noun
    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?
See the Oxford Advanced Learner's Dictionary entry: mister