A generalization of special relativity to include gravity (based on the principle of equivalence) WordNet 3.0 & Open English WordNet

General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics. Wikipedia

Albert Einstein's theory of gravitation Wikipedia Disambiguation

Geometric theory of gravitation published by Albert Einstein in 1916, positing that spacetime is a 4-dimensional Lorentzian manifold whose curvature is proportional to the stress–energy tensor of matter Wikidata

A fundamental physical theory of gravitation which corrects and extends Newtonian gravitation, especially at the macroscopic level of stars and planets. OmegaWiki

A theory extending special relativity and uniformly accounting for gravity and accelerated frames of reference, postulating that space-time curves in the presence of mass. Wiktionary

Theory in physics. Wiktionary (translation)