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

     

    MO

     noun
    noun
    BrE BrE//ˌem ˈəʊ//
     
    ; NAmE NAmE//ˈoʊ//
     
     
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  1. 1(British English) medical officer
  2. 2(also M.O.) modus operandi