dark energy

noun

: a hypothetical form of energy that produces a force that opposes gravity and is thought to be the cause of the accelerating expansion of the universe

Examples of dark energy in a Sentence

Recent Examples on the Web
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There was all sort of bizarre things going on, and there were lots of observations in cosmology that were beginning to support the idea of inflation, dark energy, and so forth. Quanta Magazine, 24 July 2025 Scientists will use this data to study dark matter and dark energy, which make up most of the universe but remain mysterious. Kurt Knutsson, FOXNews.com, 14 July 2025 The facility, named after Vera C. Rubin — the astronomer who confirmed the existence of dark matter in galaxies — aims to continue her legacy by mapping dark matter and probing dark energy. Jamie Carter, Forbes.com, 23 June 2025 One of those, presented in a paper in June but not yet peer-reviewed, proposes a complex model for dark energy that allows for surprising behavior. Paul Sutter, Space.com, 24 July 2025 See All Example Sentences for dark energy

Word History

First Known Use

1998, in the meaning defined above

Time Traveler
The first known use of dark energy was in 1998

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Cite this Entry

“Dark energy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20energy. Accessed 3 Sep. 2025.

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