Definitions

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.

This compact book weaves together topics including the microscopic quantum tunneling required for nuclear fusion and the macroscopic geometry of spacetime.

From The Wall Street Journal • May 19, 2026

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

From MarketWatch • May 18, 2026

Musk’s complaint also alleges that Altman engaged in self-dealing by directing OpenAI to pursue deals with companies in which he also held a personal stake, including nuclear fusion power company Helion.

From Los Angeles Times • May 12, 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

When we look up at night and view the stars, everything we see is shining because of distant nuclear fusion.

From "Cosmos" by Carl Sagan