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

      

    interaction

     noun
    noun
    BrE BrE//ˌɪntərˈækʃn//
     
    ; NAmE NAmE//ˌɪntərˈækʃn//
     
    [uncountable, countable]
     
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  1. 1interaction (between A and B) | interaction (of A) (with B) the act of communicating with somebody, especially while you work, play or spend time with them the interaction between performers and their audience
  2. 2interaction (between A and B) | interaction (of A) (with B) if one thing has an interaction with another, or if there is an interaction between two things, the two things have an effect on each other the interaction of bacteria with the body’s natural chemistry