Main Entry:

com·bus·tion

Pronunciation:

\kəm-ˈbəs-chən\

Function:

noun

Date:

15th century

1: an act or instance of burning2: a usually rapid chemical process (as oxidation) that produces heat and usually light ; also : a slower oxidation (as in the body)3: violent agitation : tumult

— com·bus·tive \-ˈbəs-tiv\ adjective