Definitions

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.

Rising power use at AI data centers is boosting demand for uranium-fueled nuclear energy.

From The Wall Street Journal • May 25, 2026

The cruel irony is that this danger is arriving precisely as the world is rushing toward nuclear energy.

From Salon • May 21, 2026

The Trump administration announced another $94 million in cost-sharing grants as it continues to encourage the buildout of the nuclear energy sector.

From Barron's • May 15, 2026

A power purchasing agreement with nuclear energy start-up Helion Energy was flagged as particularly worrisome, given the firm has yet to ever deliver any power.

From BBC • May 15, 2026

But Dad’s main interest was energy: thermal energy, nuclear energy, solar energy, electrical energy, and energy from the wind.

From "The Glass Castle" by Jeannette Walls