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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
One of cosmology’s greatest mysteries is the nature of dark energy—the invisible force that keeps the universe expanding at an ever-increasing rate. — Jeffrey Kluger, Time, 15 Oct. 2026 The instrument was specifically devised to investigate dark energy and its pervasive influence. — Robert Lea, Space.com, 13 Oct. 2026 While the mission was designed with dark energy, dark matter, and exoplanets in mind. — Richard Tribou, The Orlando Sentinel, 13 Oct. 2026 Once there, Roman will study some of the biggest mysteries in astronomy, from dark energy to the formation of galaxies. — Thomas Fauchez, The Conversation, 14 Sep. 2026 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

Rhymes for dark energy

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Browse Nearby Words

darkener
dark energy
darken someone's door/doors
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Cite this Entry

“Dark energy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20energy. Accessed 19 Oct. 2026.

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