nuclear fusion

[noo-klee-er fyoo-zhuhn, nyoo-] / ˈnu kli ər ˈfyu ʒən, ˈnyu- /

NOUN

atomic fusion

Synonyms

WEAK

cold fusion fusion fusion reaction laser-induced fusion thermonuclear fusion thermonuclear reaction

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Actual power from nuclear fusion “has seemingly always been 10 to 20 years away,” Levin said.

From MarketWatch • May 18, 2026

Zilis recounted an OpenAI board meeting during which the AI lab was considering striking a deal with nuclear fusion startup Helion.

From The Wall Street Journal • May 6, 2026

Shares are down 63% over the past 12 months with investors seemingly unimpressed by its merger with nuclear fusion start-up TAE Technologies, announced in December.

From Barron's • Apr. 22, 2026

Being accused of attempting the impossible is not unusual for the scientists and engineers working on nuclear fusion projects around the world.

From BBC • Apr. 20, 2026

It assumes the existence of a nuclear fusion reactor— something much safer as well as more efficient than existing fission power plants.

From "Cosmos" by Carl Sagan