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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Physicists have developed a highly precise and ultra-sensitive atomic clock based on ytterbium, which could test the limits of the Standard Model and even search for elusive dark matter. Georgina Jedikovska, Interesting Engineering, 4 Apr. 2026 But just wait to hear what dark matter Edward Albee’s 2002 comic tragedy has in store for them. Steven Winn, San Francisco Chronicle, 3 Apr. 2026 Differing interpretations of dark matter’s meaning Some scientists, such as astrobiologist Adam Frank, warn that seeking sacredness in topics like dark matter might end in disappointment because science constantly evolves. Deepa Bharath, Los Angeles Times, 30 Mar. 2026 These include managing the training schedules for an entire astronaut class (the 2017 class), helping to create tools for the tricky repair of a dark matter detector on the ISS, and helping to advise space policymakers in Canada. Elizabeth Howell, Space.com, 30 Mar. 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 5 Apr. 2026.

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