Definition of counter- combining form from the Oxford Advanced Learner's Dictionary

     

    counter-

     combining form
    combining form
    BrE BrE//ˈkaʊntə(r)//
     
    ; NAmE NAmE//ˈkaʊntər//
     
    (in nouns, verbs, adjectives and adverbs)
     
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  1. 1against; opposite counterterrorism counter-argument
  2. 2corresponding counterpart
See the Oxford Advanced American Dictionary entry: counter-