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

     

    decimation

     noun
    noun
    BrE BrE//ˌdesɪˈmeɪʃn//
     
    ; NAmE NAmE//ˌdesɪˈmeɪʃn//
     
    [uncountable]
     
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  1. 1the act of killing large numbers of animals, plants or people in a particular area the decimation of the indigenous population
  2. 2(informal) the act of severely damaging something or making something much weaker We need to halt the decimation of our manufacturing base.