Einstein's theory of relativity

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Noun

1.

Einstein's theory of relativity - (physics) the theory that space and time are relative concepts rather than absolute conceptsrelativity, relativity theory, theory of relativityscientific theory - a theory that explains scientific observations; "scientific theories must be falsifiable"natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"Einstein's general theory of relativity, general relativity, general relativity theory, general theory of relativity - a generalization of special relativity to include gravity (based on the principle of equivalence)Einstein's special theory of relativity, special relativity, special relativity theory, special theory of relativity - a physical theory of relativity based on the assumption that the speed of light in a vacuum is a constant and the assumption that the laws of physics are invariant in all inertial systemsevent - a phenomenon located at a single point in space-time; the fundamental observational entity in relativity theory