jet engine noun2 •An engine that obtains thrust by taking in air at the front, using it to burn fuel, then ejecting the hot combustion products at the rear through a propulsive nozzle.L.A. International Airport, where the big jet engines roar — 1971 •Any engine propelled by expelling a high speed fluid jet (jet propulsion), such as a rocket, turbojet, turbofan, ramjet, etc. formsjet engines
