> By every dictionary definition, a car has wheels. That is not a car. It's a hover > craft.
Then what use are wheels when we no longer require roads?
Yeah, sure. By definition a mere 'Car' has wheels. That's not defining a 'Flying Car'. That's different.
In the above pic I've provided for an example it both hovers and has wheels. At the very least - it would qualify as a 'flying car' (a car that has the ability to fly and/or hover). And by "Flight" - we mean not having to make contact with the ground in order to maintain mobility or momentum.
Methods of hovering ability, floating, flying, or however you wish to define it's state of being off and away from the ground are numerous (don't feel like listing the different possibilities -atm).
Check this out.
Aren't they adorable?
So, I'm not sure if you're wanting to pin down the definition of "flight" as something with wings, that uses speed, and negative air pressure, to gain lift (or however it goes). But, that's seems to be why you're so hard pressed to defend your stance.