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English definition of “combustion”

combustion

noun [U] uk   /kəmˈbʌs.tʃən/ us  
the process of burningBurning, burnt and on fire specialized chemistry the chemical process in which substances mix with oxygen in the air to produce heat and lightPhysical and chemical processes
(Definition of combustion from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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