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 There is a difference between the expansion rate of the local universe and that of the distant universe right after the big bang -- and scientists don't know why. Ashley Strickland, CNN, 28 May 2022 The benefits of a pilot approach as opposed to a big bang transformation are well known in the agility community. Andrea Fryrear, Forbes, 26 Apr. 2022 Starting from circa 400,000 years after the big bang—before the first stars are thought to have emerged—the simulation extrapolates out through the first billion years of cosmic history. Charles Q. Choi, Scientific American, 10 May 2022 It was born just 900 million years after the big bang. Ashley Strickland, CNN, 2 Apr. 2022 The previous record for the furthest star ever recorded was the blue star Icarus, which was discovered in 2018 and took 9 billion years to reach Earth, around 4 billion years after the big bang. Jordan Mendoza, USA TODAY, 30 Mar. 2022 The first stars and galaxies formed something like 300 million years after the big bang. Joel Achenbach, Anchorage Daily News, 30 Mar. 2022 These researchers rely on the cosmic microwave background, a residual glow of radiation from roughly 400,000 years after the big bang. Daniel Leonard, Scientific American, 25 Jan. 2022 Found in the constellation Cetus near the star Mira, Earendel’s light was emitted about 900 million years after the universe began its expansion — the big bang. Joel Achenbach, Anchorage Daily News, 30 Mar. 2022 See More

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.

First Known Use of big bang

1949, in the meaning defined above

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Time Traveler for big bang

Time Traveler

The first known use of big bang was in 1949

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Dictionary Entries Near big bang

big band

big bang

big bang theory

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Statistics for big bang

Last Updated

4 Jun 2022

Cite this Entry

“Big bang.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/big%20bang. Accessed 26 Jun. 2022.

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