(a) Physics Of, concerning, or resulting from rates approaching the speed of light: relativistic boost in mass.
(a) Physics regarding or in line with the theory of relativity: relativistic mechanics.
relativistic in Community Dictionary
moving at an exceptionally high velocity.from Unique Theory of Relativity published in 1905 by Albert Einstein along with his phrase e=mc^2.Although this term is purely a hyperbole, since just really small particles in laboratory accelerators can approach the rate of light, it really is usage is a suitable exaggeration in certain situations. by Michelina BurchfieldReport definition