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Definitions

radioactive

[rey-dee-oh-ak-tiv] / ˌreɪ di oʊˈæk tɪv /
ADJECTIVE
active
Synonyms


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.

We’re proud of the results we’ve achieved over the past 17 months against air and water pollution, lead poisoning, ozone depletion and radioactive waste.

From The Wall Street Journal • Jun. 28, 2026

Overuse of today’s AI models isn’t going to lead to a massive plume of radioactive fallout, but it could have a number of far-reaching consequences that will seem obvious in retrospect.

From The Wall Street Journal • Jun. 21, 2026

The doors slide open, revealing the entrance to what is expected to be the world's first permanent repository for radioactive spent nuclear fuel.

From Barron's • Jun. 1, 2026

The director-general of the IAEA, Rafael Grossi, has warned repeatedly about the risk of a radioactive incident at such plants.

From Salon • May 21, 2026

And in the early hours of Tuesday morning, the favorable winds that had been sweeping the radioactive gases out to sea had shifted, carrying radioactive cesium inland.

From "Meltdown" by Deirdre Langeland



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