relativity Meaning, Definition & Usage

  1. noun (physics) the theory that space and time are relative concepts rather than absolute concepts
    theory of relativity; Einstein's theory of relativity; relativity theory.
  2. noun the quality of being relative and having significance only in relation to something else

WordNet

Rel`a*tiv"i*ty noun
Definitions
  1. The state of being relative; as, the relativity of a subject. Coleridge.

Webster 1913