1. Manipulation of material, on both a micro (particles, atoms, etc) and macro(cells, whole objects, etc) level, through the power of ones mind.
2. To cause physical change, movement or otherwise, to an object without the application of physical force.
3. Use of pyschokinetic energy to physicaly affect an object.
Psychokinesis is one of the most sought after abilities within the realm of "Modern Psionics."