dark matter

noun

: nonluminous matter not yet directly detected by astronomers that is hypothesized to exist to account for various observed gravitational effects

Examples of dark matter in a Sentence

Recent Examples on the Web
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To decode the mysterious forces of dark matter and dark energy. Bernard Marr, Forbes.com, 24 July 2025 Despite the size, the images could be the key to cracking the case of what dark matter truly is. Kenna Hughes-Castleberry, Space.com, 22 July 2025 Physicists have also used AI to find a new equation for describing the clumping of the universe’s unseen dark matter. Quanta Magazine, 21 July 2025 The other strange thing here is that all of this is very sensitive to how much dark matter annihilation is taking place. ArsTechnica, 16 July 2025 See All Example Sentences for dark matter

Word History

First Known Use

1933, in the meaning defined above

Time Traveler
The first known use of dark matter was in 1933

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Cite this Entry

“Dark matter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20matter. Accessed 29 Jul. 2025.

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