Definition of barbarous adjective from the Oxford Advanced Learner's Dictionary

     

    barbarous

     adjective
    adjective
    BrE BrE//ˈbɑːbərəs//
     
    ; NAmE NAmE//ˈbɑːrbərəs//
     
    (formal)
     
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  1. 1extremely cruel and shocking the barbarous treatment of these prisoners of war
  2. 2showing a lack of education and good manners
  3. Word Origin late Middle English ((in sense 2)): via Latin from Greek barbaros ‘foreign’ + -ous.
See the Oxford Advanced American Dictionary entry: barbarous