
In rocketry, the irregular burning of fuel left in the combustion chamber of a rocket after cutoff.
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http://www.daviddarling.info/encyclopedia/A/afterburning.html

Method of increasing the thrust of a gas turbine (jet) aeroplane engine by spraying additional fuel into the hot exhaust duct between the turbojet and the tailpipe where it ignites. Used for short-term increase of power during takeoff, or during combat in military aircraft
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https://www.encyclo.co.uk/local/21221

combustion in an afterburner that results from the injection of fuel into the exhaust gases of a jet engine to produce additional thrust with more efficient fuel consumption. · an irregular burning of residual fuel in some rocket motors after the cessation of the main burning.
Found on
https://www.infoplease.com/dictionary/afterburning
No exact match found.