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.

Against this backdrop, nuclear energy is re-emerging as a practical solution.

From The Wall Street Journal • Apr. 9, 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

The Israeli report also said Iran would see an end to all sanctions and receive assistance in developing civil nuclear energy.

From Barron's • Mar. 25, 2026

India and Canada have announced a host of agreements, including a 10-year nuclear energy deal, after their prime ministers met in Delhi to reset ties that plummeted due to diplomatic tensions.

From BBC • Mar. 2, 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