Wiktionary
afterburning
n. The injection of extra fuel into a jet engine downstream of the turbines in order to achieve extra thrust
Usage examples of "afterburning".
The afterburning climb had nearly emptied her tanks, but she had enough to make Langley without tanking again.
That afterburning, fardling collection of random neural firings Inspector General!
Much of the skin not exposed to high levels of heat in supersonic flight was composed of radar-absorbent material, and the huge engine air inlets for the four Kuznetsov NK-32 afterburning engines had been redesigned so the engines' compressor blades wouldn't reflect radar energy.