That's it's relationship to voltage and current, but does not define what resistance is. It's incorrect to say this is what resistance is because fundamentally resistance isn't actually a function of voltage and current, its a property of the object itself irrespective of current and voltage; an object has resistance even at zero current and voltage.
resistance is useless!
It is useless to resist!
His cigarette is burning but he never seems to ash.
Best laugh of the day so far. Someone deserves a fist bump for this one.
Then explain this!