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



    BrE BrE//əˌkjuːmjəˈleɪʃn//
    ; NAmE NAmE//əˌkjuːmjəˈleɪʃn//
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  1. 1[uncountable] the process of gradually increasing or getting more and more of something over a period of time the accumulation of wealth
  2. 2[countable] an amount of something that has gradually increased over a period of time an accumulation of toxic chemicals