Your definition for "flying" is hard irrelevant. Any toy plane that we do call "flying" flies only for seconds, but has concepts like lift / and / or thrust and / or aerial control thru different ways like aerodynamic stability or in-air thrust. So did the first aeroplane too. Hell, even hyper-maneuvering multi-mach air-to-air missiles just "jump" with your worthless definition of "flight".