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

      

    reinforcement

     noun
    noun
    BrE BrE//ˌriːɪnˈfɔːsmənt//
     
    ; NAmE NAmE//ˌriːɪnˈfɔːrsmənt//
     
    The police
     
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  1. 1reinforcements [plural] extra soldiers or police officers who are sent to a place because more are needed to send in reinforcements See related entries: The police
  2. 2[uncountable, singular] the act of making something stronger, especially a feeling or an idea the reinforcement of existing prejudices by the media
  3. Extra examples Reinforcements arrived too late. The children respond well to praise and positive reinforcement. The crowd was very large and police reinforcements were called in. The instructor provides reinforcement to elicit the desired response. The minister’s statement provides reinforcement for the view that tax cuts are likely in the budget. The windows have steel reinforcement. We need urgent reinforcements.
See the Oxford Advanced American Dictionary entry: reinforcement