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

What’s more, Trump Media & Technology Group and nuclear fusion firm TAE Technologies are looking for sites to build a fusion power plant, after agreeing to a merger late last year.

From The Wall Street Journal • Jan. 8, 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

There is also plenty of uncertainty about the future of nuclear fusion.

From Barron's • Dec. 22, 2025

Soon after taking office as AEC chairman in 1953, Strauss expanded Project Sherwood, an Atoms for Peace program aimed at developing electric power reactors based on nuclear fusion.

From "Big Science" by Michael Hiltzik