Definition from Wiktionary, the free dictionary
- 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
- any engine propelled by expelling a high speed fluid jet (jet propulsion), such as a rocket, turbojet, turbofan, ramjet etc.
Derived terms 
Related terms 
See also 
an engine that develops thrust by ejecting a jet, especially a jet of gaseous combustion products