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

General relativity is incompatible with quantum mechanics, despite our best efforts to reconcile the two, and does not explain dark energy. — Jacek Krywko, ArsTechnica, 10 July 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, 9 July 2026

Researchers hope the effort may yield clues about dark matter as well as an equally puzzling force known as dark energy. — Adithi Ramakrishnan, Los Angeles Times, 7 July 2026

Scientists expect the project to reveal new asteroids, supernovas, and clues about dark matter and dark energy. — Eric Lagatta, USA Today, 7 July 2026

Word History

First Known Use

1998, in the meaning defined above

Rhymes for dark energy

• bioenergy