There are many ways of defying gravity! You can jump, you can get into an airplane, rocket or even pull yourself up.
If you mean negating gravity entirely, well, it isn't possible. At least not without needing some undiscovered exotic matter or infinite energy.
It would also be quite dangerous, as soon as you negate gravity on your body you would be launched away from the Earth as the Earth continues its orbit around the Sun at many many kilometers per hour, leaving you behind!
It doesn't, nothing can defy gravity.
It is impossible to actually "defy" gravity. Even the Voyager spacecraft at over four billion miles from the earth experience some gravity from the earth. Satellites can orbit the earth at as low as 220 miles or less. They still fall toward the earth, but their forward speed carries them at an arc that matches the earth's surface.
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.
jumping on a trampoline. an airplane ride. swinging. bungee jumping
The water seemed to defy gravity.
No, they don't.