big bang

noun

Definition of big bang

: the cosmic explosion that marked the beginning of the universe according to the big bang theory In 1965 Arno A. Penzias and Robert W. Wilson of the Bell Telephone Laboratories discovered that the space of the universe is bathed with a diffuse radiation that is assumed to persist following the "big bang" expansion of the universe from an original fireball.— V. L. Ginzburg — compare big crunch, big rip

Examples of big bang in a Sentence

Recent Examples on the Web

Both contributed to our modern understanding of the big bang, black holes, galaxies and other cosmic matters. John Horgan, WSJ, "‘Brief Answers to the Big Questions’ and ‘On the Future’ Review: Serious Doubt on Serious Earth," 18 Oct. 2018 The universe sprang into existence in the big bang as a hot, dense soup of subatomic particles. Adrian Cho, Science | AAAS, "Galaxy simulations are at last matching reality—and producing surprising insights into cosmic evolution," 30 May 2018 USA TODAY Sports PHILADELPHIA – Time to get the biggest bang yet for their buck. Jarrett Bell, USA TODAY, "Eagles lean on wrecking-ball defensive line for playoff boost," 11 Jan. 2018 So is this the end for eternal inflation and the big bang singularity? Adrian Cho, Science | AAAS, "Stephen Hawking’s (almost) last paper: putting an end to the beginning of the universe," 2 May 2018 The big bang generated only hydrogen and a bit of helium. Daniel Clery, Science | AAAS, "Discovery of middleweight black holes could explain origin of million-solar-mass monster," 30 May 2018 In this formulation the big bang was literally the beginning of time. Alexander Hellemans, Scientific American, "A Conversation with Thomas Hertog, One of Stephen Hawking’s Final Collaborators," 24 May 2018 In addition, scientists with the European Space Agency's Planck spacecraft in 2013 released an exquisitely precise measurement of the afterglow of the big bang, the cosmic microwave background (CMB). Adrian Cho, Science | AAAS, "Reports of sterile neutrino’s resurrection may be greatly exaggerated," 4 June 2018 Research is all about the biggest bang, but the imperative for products is bang-for-the-buck. Scott Kirsner, BostonGlobe.com, "After viral YouTube fame, Boston Dynamics is ready to sell its robots," 6 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'big bang.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of big bang

1949, in the meaning defined above

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23 Apr 2019

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The first known use of big bang was in 1949

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