a device in the exhaust system of an internal-combustion engine for removing or rendering harmless potentially dangerous components in the exhaust gases
2.
a system of fuel injection and combustion located behind the turbine of an aircraft jet engine to produce additional thrust
afterburner in American English
(ˈæftərˌbɜrnər)
noun
1.
a device within the tailpipe of some jet engines for burning extra fuel to produce additional thrust
2.
an auxiliary device, as on internal-combustion engines and incinerators, for burning undesirable exhaust gases produced during the original combustion