- a device placed within, or attached to the exit of, a jet-engine exhaust pipe to produce afterburning.
- a device for burning exhaust fumes from an internal-combustion engine, as of an automobile.
- a device in the exhaust system of an internal-combustion engine for removing or rendering harmless potentially dangerous components in the exhaust gases
- a system of fuel injection and combustion located behind the turbine of an aircraft jet engine to produce additional thrust
