Definition of combustion
1 : an act or instance of burning Smoke is produced during combustion.
2 : a usually rapid chemical process (such as oxidation) that produces heat and usually light The carburetor mixes fuel with air for combustion. also : a slower oxidation (as in the body)
3 : violent agitation : tumult … periods of great social combustion alternating with quiescence …— Kurt Andersen
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