The process of burning something
the combustion of fossil fuels
In some diesel engines: commencement of combustion of the fuel in an auxiliary chamber, before it is drawn into the main cylinder. Compare prechamber.
An enclosed space in which combustion takes place, especially in an engine or furnace
(In an engine) combustion of the fuel outside the chamber where the force is developed and motion produced (as in a steam engine or a turbine); usually attributive.
Combustion (in early use especially spontaneous combustion) occurring or supposed to occur within something; specifically the metabolic process by which heat is generated in the animal body.
The ignition of organic matter (e.g., hay or coal) without apparent cause, typically through heat generated internally by rapid oxidation
An engine that generates motive power by the burning of gasoline, oil, or other fuel with air inside the engine, the hot gases produced being used to drive a piston or do other work as they expand
Combustion of petrol, oil, or other fuel within a closed space inside an engine, with the hot gases produced driving a piston or doing other work inside that space; frequently attributive, especially in internal combustion engine.