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

His research explores subjects like gravitational physics, dark matter, dark energy and observational cosmology, according to Harvard's website. — Ashley Capoot, CNBC, 21 Oct. 2026

Stubbs later headed the ESSENCE supernova cosmology project which gathered further evidence on the nature of dark energy. — Jeremy Kahn, Fortune, 21 Oct. 2026

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

Word History

First Known Use

1998, in the meaning defined above

Rhymes for dark energy

• bioenergy