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

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The still unanswered question has led to ever more sensitive detector technology and a deeper understanding of what dark matter isn’t. Jeanna Bryner, Scientific American, 15 Sep. 2026 Potential dark matter collisions are believed to be extremely rare. Jacopo Prisco, CNN Money, 14 Sep. 2026 This includes probing the nature of dark matter, the invisible sort of matter that somehow dominates the universe, and dark energy, the mysterious force causing the expansion of our universe to accelerate. Robert Lea, Space.com, 10 Sep. 2026 The observations are expected to contribute to research into galaxy formation and evolution, the distribution of dark matter and the development of large-scale cosmic structures. Prabhat Ranjan Mishra, Interesting Engineering, 10 Sep. 2026 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 21 Sep. 2026.

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