Definitions for "Relativistic"
of, pertaining to, or in conformity with the theory of relativity; as, the relativistic increase of mass with velocity.
moving at a speed sufficiently high that the changes of mass or time dilation predicted by the theory of relativity may be observed; moving at a significant fraction of the speed of light; as, relativistic electrons.
Having a velocity that is such a large fraction of the speed of light that the special theory of relativity must be applied.
Keywords:  philosophical, doctrine
of or relating to the philosophical doctrine of relativism