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Definition of combustion noun from the Oxford Advanced American Dictionary

     

    combustion

     noun
    noun
    NAmE//kəmˈbʌstʃən//
     
    [uncountable]
     
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  1. 1the process of burning
  2. 2(technology) a chemical process in which substances combine with the oxygen in the air to produce heat and light
See the Oxford Advanced Learner's Dictionary entry: combustion