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.

The successful launch of the Shippingport Atomic Power Station in 1957 proved that nuclear energy could be safely harnessed to generate electricity for civilian grids.

From The Wall Street Journal • Apr. 24, 2026

An estimated 200,000 people gathered in New York City that September to rally against nuclear energy and hear speeches from Jane Fonda and Ralph Nader.

From The Wall Street Journal • Apr. 22, 2026

New polling from YouGov suggests growing support for nuclear energy in Scotland, with the majority of people now backing it as part of the country's energy supply.

From BBC • Apr. 3, 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

Still, the idea of attempting to release nuclear energy in the middle of a city of three million made Groves very nervous.

From "Bomb" by Steve Sheinkin