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.

The instrument is TAE Technologies, a Foothill Ranch-based company working to develop the technology of nuclear fusion as a clean energy source.

From Los Angeles Times • Mar. 3, 2026

These stars could be powered not only by nuclear fusion, but also by energy released when dark matter particles annihilate.

From Science Daily • Jan. 28, 2026

CFS also said in Las Vegas that it has installed the first high-strength magnet in its nuclear fusion machine, although it still has 18 to go, which should be complete this summer.

From The Wall Street Journal • Jan. 6, 2026

A Bill Gates-backed nuclear fusion company has teamed up with tech giants Nvidia and Siemens in an effort to bring the energy that powers the sun a step closer to commercial reality.

From The Wall Street Journal • Jan. 6, 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