Airplanes do not "defy gravity", any more than you do when you walk upstairs.
In both cases, an upward force is generated that is greater than the downward force
of gravity on an object. Since the net force on the object is then upward, the object
accelerates upward.
It doesn't, nothing can defy gravity.
No. The wings are shaped such that there is constant updraft on the wings that holds the plane up so long as the forward speed continues above a certain level.
No
The plural of defy is defies. As in "this defies the laws of gravity".
The chemical that is called defying gravity.
They cannot.
Ultimately, no.
No they don't.
adhesion.
The water seemed to defy gravity.
No, they don't.
No.