dark matter


: 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 Light dark matter can be thought of as lighter variations on WIMPs, while ultralight dark matter is made of even lighter axions. Lyndie Chiou, Quanta Magazine, 7 May 2024 Most of the galaxy’s mass is locked away in a dark matter halo, according to the same release, meaning that it cannot be imaged and its presence is only detected by its gravitational effects on visible matter. Isaac Schultz / Gizmodo, Quartz, 17 May 2024 Moreover, the Standard Model offers no explanation for dark matter, nor for the mysterious dark energy that drives the accelerating expansion of space. Elise Cutts, Quanta Magazine, 17 Apr. 2024 This endeavor will yield 60 petabytes of data on the composition of the universe, the nature and distribution of dark matter, dark energy and the expansion of the universe, the formation of our galaxy, our intimate little solar system, and more. Isaac Schultz / Gizmodo, Quartz, 3 Apr. 2024 With the first year of DESI data alone, Lambda CDM fits the snapshots nearly as well as a variable dark matter model. Charlie Wood, Quanta Magazine, 4 Apr. 2024 The faint star system — the tiniest Milky Way satellite ever found — could be under the influence of dark matter. Isaac Schultz / Gizmodo, Quartz, 3 Apr. 2024 No particles of dark matter, the unseen stuff whose gravity holds galaxies together. Byadrian Cho, science.org, 28 Mar. 2024 Over-reliance on guidance, notices, memoranda, administrative interpretations and other forms of regulatory dark matter to realize regulatory priorities will only increase in the wake of the past few years’ spending and regulatory interventions. Clyde Wayne Crews Jr., Forbes, 26 Feb. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'dark matter.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1933, in the meaning defined above

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

Dictionary Entries Near dark matter

Cite this Entry

“Dark matter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20matter. Accessed 24 May. 2024.

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