1. A turbojet engine that powers a propeller: Pilatus Aircraft is a large international manufacturer of a single engine turboprop airplane and was founded in 1939.
2. An airplane equipped with two or more turbo-propeller engines: The engines of a turboprop involve four rotating propellers that rotate in opposite directions and which are positioned on the wings of an aircraft.

A turboprop is an aircraft whose propellers are driven by a gas turbine.