Definition of reinforcement noun from the Oxford Advanced American Dictionary

      

    reinforcement

     noun
    noun
    NAmE//ˌriɪnˈfɔrsmənt//
     
     
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  1. 1 reinforcements [plural] extra soldiers or police officers who are sent to a place because more are needed to send in reinforcements
  2. 2[uncountable, singular] the act of making something stronger, especially a feeling or an idea the reinforcement of existing prejudices by the media
See the Oxford Advanced Learner's Dictionary entry: reinforcement