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. (.
- synonyms: big bang theory
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). big-bang theory. Retrieved September 21, 2026, from http://smartdefine.org/big-bang_theory/definitions/1214496 |
| Chicago | WordNet. 2010. "big-bang theory" http://smartdefine.org/big-bang_theory/definitions/1214496 (accessed September 21, 2026). |
| Harvard | WordNet 2010, big-bang theory, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/big-bang_theory/definitions/1214496>. |
| MLA | WordNet. "big-bang theory" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/big-bang_theory/definitions/1214496> |