An enclosed space, within a heat engine, in which the fuel is mixed and reacted with air or other oxidizing agent in a controlled manner
(Otomotiv) The part of the cylinder within an engine block where the fuel/air mixture is compressed by the piston and ignited by a spark from the spark plug
An enclosure in which combustion, especially of a fuel or propellant, is initiated and controlled. the enclosed space, for example in an engine, in which combustion happens