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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.

“The dangers are so much different. Instead of an explosion, it just turns off. There’s no radioactive waste. So this light touch is exactly what the Congress overwhelmingly … wanted the NRC to do.”

From MarketWatch • May 18, 2026

By studying Antarctic ice that formed tens of thousands of years ago, researchers detected traces of iron-60, a rare radioactive form of iron created during supernova explosions.

From Science Daily • May 14, 2026

Instead, the deal allowed Iran’s scientists and technicians to continue gaining experience with nuclear technology and the handling of materials that aren’t only radioactive but also highly toxic and corrosive.

From The Wall Street Journal • Apr. 27, 2026

The licence was issued as environmental watchdogs such as Greenpeace raised concerns over the management of radioactive by-products.

From Barron's • Apr. 22, 2026

But now they spent their days planning and carrying out the monumental task of cleaning up a radioactive disaster zone.

From "Meltdown" by Deirdre Langeland



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