the combustion of fuel inside a cylinder (as in an internal-combustion engine)
a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine
a process in which a substance reacts with oxygen to give heat and light
the act of burning something
a state of violent disturbance and excitement
happening or arising or located within some limits or especially surface
inside the country
occurring within an institution or community
located inward
innermost or essential
