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 blue band represents the predictions from a dark matter-and-dark energy dominated Universe that follows the rules of Einstein’s general relativity, while the yellow band represents the predictions from a dark matter-free Universe that follows the rules of MOND. —Big Think, 21 Apr. 2026

The dark and faint universe Despite years upon years of searching for an answer, scientists still don't know what exactly dark matter and dark energy are. —Monisha Ravisetti, Space.com, 21 Apr. 2026

But this explanation is only one possibility for dark energy’s true nature. —Claire Cameron, Scientific American, 16 Apr. 2026

Voyer points out how this shift surfaced on the Fall/Winter 2026-2027 runways, where brands like Gucci (bodycon dresses and stilettos) and 7 For All Mankind (hi-low hemlines and satin minidresses), embraced a more undone, after-dark energy. —Angela Velasquez, Footwear News, 3 Apr. 2026

Word History

First Known Use

1998, in the meaning defined above

Rhymes for dark energy

• bioenergy