nuclear energy

[noo-klee-er en-er-jee, nyoo-] / ˈnu kli ər ˈɛn ər dʒi, ˈnyu- /

NOUN

radioactive energy source

Synonyms

STRONGEST

atomic energy nuclear power

WEAK

atomic power fission power fusion power nuclear fission power nuclear fusion power thermonuclear energy thermonuclear power

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.

However, Wang added, “China supports Iran’s efforts to safeguard its national sovereignty and security,” including its right to develop nuclear energy for peaceful purposes.

From Slate • May 7, 2026

SpaceX alumni have gone on to found companies focused on AI and robotics, nuclear energy and manufacturing.

From MarketWatch • May 7, 2026

The spacecraft, powered by a nuclear energy source, is gradually losing power, and shutting down this instrument is the most effective way to extend the life of humanity's first mission into interstellar space.

From Science Daily • May 4, 2026

And nuclear energy seems to be back in fashion as part of a home-grown European energy mix - in the UK as well as the EU.

From BBC • Apr. 3, 2026

“It may be that the day of useful nuclear energy is not so far distant after all,” he wrote to his fellow cyclotron builder Alexander Allen.

From "Big Science" by Michael Hiltzik