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[kuh m-buhs-chuh n] /kəmˈbʌs tʃən/

the act or process of burning.

violent excitement; tumult.
the process of burning
any process in which a substance reacts with oxygen to produce a significant rise in temperature and the emission of light
a chemical process in which two compounds, such as sodium and chlorine, react together to produce heat and light
a process in which a compound reacts slowly with oxygen to produce little heat and no light

early 15c., from Old French combustion (13c.), from Latin combustionem (nominative combustio) “a burning,” noun of action from past participle stem of Latin comburere “to burn up, consume,” from com-, intensive prefix (see com-), + *burere, faulty separation of amburere “to burn around,” actually ambi-urere, from urere “to burn, singe,” from PIE root *eus- “to burn” (see ember).

combustion com·bus·tion (kəm-bŭs’chən)


Burning; a chemical reaction that involves the rapid combination of a fuel with oxygen. (See oxidation and spontaneous combustion.)


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