special relativity

/ˌspɛʃəl ˈrɛləˌtɪvədi/
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Definitions of special relativity
  1. noun
    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
    synonyms: Einstein's special theory of relativity, special relativity theory, special theory of relativity
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    type of:
    Einstein's theory of relativity, relativity, relativity theory, theory of relativity
    (physics) the theory that space and time are relative concepts rather than absolute concepts
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