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Word of the Day Tuesday, June 9, 2026

radioactive

/ˌreɪdiəʊˈæktɪv/ adjective · British & US
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What does radioactive mean?

adjective

Giving off or emitting ionizing radiation, especially in the form of alpha, beta, or gamma rays. Emitting ionizing radiation.

Example

"The radioactive waste was stored in a secure facility."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for radioactive

Antonyms of radioactive

Rhymes with radioactive

Etymologically related