What is the meaning of big-bang theory?

noun

  • Cosmology) the theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature. (.
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APAWordNet. (2010). big-bang theory. Retrieved September 21, 2026, from http://smartdefine.org/big-bang_theory/definitions/1214496
ChicagoWordNet. 2010. "big-bang theory" http://smartdefine.org/big-bang_theory/definitions/1214496 (accessed September 21, 2026).
HarvardWordNet 2010, big-bang theory, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/big-bang_theory/definitions/1214496>.
MLAWordNet. "big-bang theory" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/big-bang_theory/definitions/1214496>