A jet engine in which a fan driven by a turbine provides extra air to the burner and gives extra thrust(noun)
WordNet. Princeton University. 2010.
Use "turbofan engine" in a sentence
"A General Electric turbofan engine is housed in a nacelle mounted on a pylon suspended from each wing."
"Prudently, Walker took the machine no higher than ten feet and used only the main jet a General Electric CF-700-2V turbofan engine producing 4,200 pounds of thrust for lift."