a theory that deduces a cataclysmic birth of the universe (big bang ) from the observed expansion of the universe, cosmic background radiation, abundance of the elements, and the laws of physics.
- Also called big-bang model.
- Compare steady state theory.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use big bang theory in a sentence
In 1996, John Paul II called the big bang theory “more than a hypothesis.”
But in many ways, too, The big bang theory is a far more audacious series than it gets credit for.
Eight seasons in, The big bang theory is one of the funniest shows on TV.
Calvin astronomer Howard Van Till was for years the leading evangelical champion of the big bang theory.The Christian Reformed Church Still Won’t Stand Up For Science | Karl W. Giberson | June 29, 2014 | THE DAILY BEAST
Maybe missing an episode of The big bang theory or Keeping Up with the Kardashians?Would You Risk Your Life to Vote? It Looks Like 7 Million Afghans Did. | Dean Obeidallah | April 7, 2014 | THE DAILY BEAST
British Dictionary definitions for big-bang theory
a cosmological theory postulating that approximately 12 billion years ago all the matter of the universe, packed into a small superdense mass, was hurled in all directions by a cataclysmic explosion. As the fragments slowed down, the galaxies and stars evolved but the universe is still expanding: Compare steady-state theory
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cultural definitions for Big Bang theory
In astronomy, a theory according to which the universe began billions of years ago in a single event, similar to an explosion. There is evidence for the Big Bang theory in the observed red shift of distant galaxies, which indicates that they are moving away from the Earth, in the existence of cosmic microwave background, and from other data. The Big Bang theory of the origin of the universe is accepted by most astronomers today.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.