Wiktionary
n. Any engine used to propel an aircraft, including jet engines and rocket engines etc.
WordNet
n. the engine that powers and aircraft
Wikipedia
An aircraft engine is the component of the propulsion system for an aircraft that generates mechanical power. Aircraft engines are almost always either lightweight piston engines or gas turbines, except for small multicopter UAVs which are almost always electric aircraft.
Usage examples of "aircraft engine".
You suck one of those cartridge cases into an aircraft engine, like a turbine engine, and it'll beat the hell out of it.
The already faint sound of the aircraft engine died as the pilot shut it down, and then there was a backfire.
He casually raised the binoculars and scanned the sky in the direction of the faint sound of an aircraft engine.
It was not Biggs who woke him but the shouts of the ground crews, the sound of running men, the deep bellowing tone of the anti-aircraft guns along the edge of the orchard, and the roaring overhead of a Mercedes aircraft engine.
Outside the hangar came the popping sound of an aircraft engine firing up.
Maxwell and Young were accustomed to the hum of an aircraft engine and the faint glow of instrument lights that their eyes scanned automatically between outward sweeps for hostile aircraft, and the gentle floating sensation of an aircraft moving through the night sky.
Dodging running men and jet aircraft engine blast, Tufayli led the way across the steel non-slip deck, over countless hoses, ropes, cables, chain, to the huge island superstructure and the hatch that would take them below.
Air Force ground crewmen hurried to move the stairway away from the aircraft, and there immediately came the whine of an aircraft engine being started.
They could hear the sound of the aircraft engine, but all they could see of it was the orange glow of the engine exhaust, and there was no way to judge from that where the aircraft was.
The faint sound of an aircraft engine caught Cletus's attention and he tried to look up at the sky.