Anti-gravity pertains to the movement of an object, or person through telepathy and levitation.  It exists, only in the minds of people who believe in transcendentalism, through channeling of the mind.  According to the laws of physics, all accepted models of general relativity used to explain the forces of gravity conceptually disprove the possibility of anti-gravity.  There is no known force which can be utilized to escape the effects of gravity without inducing an existing outside force on gravity such as jets, engines, and helium.  

Best described in the realm of traveling, it is process of using the brains natural abilities to temporarily levitate from any surface and move without the effects of gravity.  In most circles of thought, the ability to move past the constraints of gravity are tied to the concepts of astral projection.  Through the use of anti-gravity, people can harness their spiritual form of light energy and transport themselves to different places and times.  

Much study of the anti-gravity concept has been done in science.  The benefits of discovering an actual way to control gravity would be enormous to the world as we know it.  The military and space sciences industry has spent millions looking for mathematical models which render a positive confirmation that overcoming gravity is possible.  If found, it would revolutionize travel.  

John Hutichinson, a noteworthy enthusiast of the existence of anti-gravity has made several reports of overcoming gravity.  He offers filmed demonstrations of his experiments though scientists have failed thus far to reproduce his results in a laboratory.  There are some very convincing filmed experiments on Youtube.com in which there does appear to be levitation caused by some unseen force.