The rotor blades are designed so that as they spin they push down on the air, which in turn pushes up on the blades, creating lift that acts counter to gravity.
It doesn't, nothing can defy gravity.
No
The plural of defy is defies. As in "this defies the laws of gravity".
The chemical that is called defying gravity.
Ultimately, no.
They cannot.
No they don't.
adhesion.
The water seemed to defy gravity.
No, they don't.
No.
nothing