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
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But for dark energy — or inflationary energy, for that matter — its defining feature is that its energy density is the thing that remains constant.
—
Big Think, 24 Oct. 2025
Scientists know even less about dark energy, which makes up the remaining 68% of the universe.
—Eric Lagatta, USA Today, 13 Oct. 2025
Roman will not only revolutionize our understanding of dark matter and dark energy, it is expected to add 100,000 planets to our census.
—Josh Dinner, Space.com, 6 Oct. 2025
This dark energy, which Einstein labeled with the Greek letter lambda, has long been assumed to be unchanging and reliable through time.
—Rebecca Boyle, Scientific American, 4 Oct. 2025
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Big Think, 24 Oct. 2025
Scientists know even less about dark energy, which makes up the remaining 68% of the universe.
—Eric Lagatta, USA Today, 13 Oct. 2025
Roman will not only revolutionize our understanding of dark matter and dark energy, it is expected to add 100,000 planets to our census.
—Josh Dinner, Space.com, 6 Oct. 2025
This dark energy, which Einstein labeled with the Greek letter lambda, has long been assumed to be unchanging and reliable through time.
—Rebecca Boyle, Scientific American, 4 Oct. 2025
See All Example Sentences for dark energy
Cite this Entry
“Dark energy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20energy. Accessed 8 Nov. 2025.
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