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
The placeholder name for the force driving this acceleration is dark energy.
—
Robert Lea, Space.com, 12 May 2026
Why does empty space still have a non-zero amount of energy — dark energy, or a cosmological constant — intrinsic to it?
—Big Think, 7 May 2026
While the mission was designed with dark energy, dark matter, and exoplanets in mind, Roman’s unprecedented observational capability will offer practically limitless opportunities for astronomers to explore all kinds of cosmic topics.
—Richard Tribou, The Orlando Sentinel, 1 May 2026
In its time orbiting Earth, Hubble has shaped our understanding of the universe by observing the atmospheric composition of planets around other stars and even discovering dark energy – a mysterious force that causes the universe to expand.
—Eric Lagatta, USA Today, 27 Apr. 2026
See All Example Sentences for dark energy
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.
Robert Lea, Space.com, 12 May 2026
Why does empty space still have a non-zero amount of energy — dark energy, or a cosmological constant — intrinsic to it?
—Big Think, 7 May 2026
While the mission was designed with dark energy, dark matter, and exoplanets in mind, Roman’s unprecedented observational capability will offer practically limitless opportunities for astronomers to explore all kinds of cosmic topics.
—Richard Tribou, The Orlando Sentinel, 1 May 2026
In its time orbiting Earth, Hubble has shaped our understanding of the universe by observing the atmospheric composition of planets around other stars and even discovering dark energy – a mysterious force that causes the universe to expand.
—Eric Lagatta, USA Today, 27 Apr. 2026
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 16 May. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
