scientific theory - a theory that explains scientific observations; "scientific theories must be falsifiable"

natural philosophy, physical science, physics - the science of matter and energy and their interactions

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 systems

event - a phenomenon located at a single point in space-time; the fundamental observational entity in relativity theory