Full Idea
If motion just is change of distance between two objects, it does not involve any kind of intrinsic change in the objects in question.
Gist of Idea
If motion is change of distance between objects, it involves no intrinsic change in the objects
Source
E.J. Lowe (A Survey of Metaphysics [2002], p.242)
Book Reference
Lowe,E.J.: 'A Survey of Metaphysics' [OUP 2002], p.242
A Reaction
It sound respectably relativistic, but I doubt the definition. x is moving relative to y, then y attains x's velocity, so x ceases to move? Maybe.