 # relativity Idioms & Phrases

#### einstein's general theory of relativity

• noun a generalization of special relativity to include gravity (based on the principle of equivalence)
Einstein's general theory of relativity; general relativity; general relativity theory.

#### einstein's special theory of relativity

• 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
special relativity theory; Einstein's special theory of relativity; special relativity.

#### einstein's theory of relativity

• noun (physics) the theory that space and time are relative concepts rather than absolute concepts
Einstein's theory of relativity; relativity; relativity theory.

#### general relativity

• noun a generalization of special relativity to include gravity (based on the principle of equivalence)
Einstein's general theory of relativity; general relativity; general relativity theory.

#### general relativity theory

• noun a generalization of special relativity to include gravity (based on the principle of equivalence)
Einstein's general theory of relativity; general relativity; general relativity theory.

#### general theory of relativity

• noun a generalization of special relativity to include gravity (based on the principle of equivalence)
Einstein's general theory of relativity; general relativity; general relativity theory.

#### principle of relativity

• noun (physics) a universal law that states that the laws of mechanics are not affected by a uniform rectilinear motion of the system of coordinates to which they are referred

#### relativity theory

• noun (physics) the theory that space and time are relative concepts rather than absolute concepts
Einstein's theory of relativity; relativity; relativity theory.

#### special relativity

• 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
special relativity theory; Einstein's special theory of relativity; special relativity.

#### special relativity theory

• 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
special relativity theory; Einstein's special theory of relativity; special relativity.

#### special theory of relativity

• 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
special relativity theory; Einstein's special theory of relativity; special relativity.

#### theory of relativity

• noun (physics) the theory that space and time are relative concepts rather than absolute concepts
Einstein's theory of relativity; relativity; relativity theory.