grand unified theory

noun

1. physics any of a number of theories of elementary particles and fundamental interactions designed to explain the gravitational, electromagnetic, strong, and weak interactions in terms of a single mathematical formalism GUT

grand unified theory

/ grănd /

1. A theory of elementary forces that unites the weak, strong, electromagnetic, and gravitational interactions into one field theory and views the known interactions as low-energy manifestations of a single unified interaction.

Grand Unified Theory

1. A theory that describes the behavior of matter at temperatures that existed only in the first fraction of a second after the Big Bang . In these theories, the strong , weak , and electromagnetic forces are unified. The greatest triumph of GUTs is that they explain the absence of antimatter in the universe. ( See also unified field theory .)