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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.

Forty years later, the highly radioactive remains of the plant are in a warzone.

From BBC • Apr. 18, 2026

In these reactions, atomic nuclei repeatedly absorb neutrons and then undergo radioactive decay until they reach stable forms.

From Science Daily • Apr. 14, 2026

Neighbouring Arab Gulf states have frequently expressed concerns about the plant's reliability and raised the risk of radioactive leaks in the event of a major earthquake.

From Barron's • Apr. 4, 2026

The extraction of the material would likely need to be conducted by an elite special operations team specially trained to remove radioactive material from a conflict zone.

From The Wall Street Journal • Mar. 29, 2026

But before operators could open the vents, which would likely still release some radioactive steam into the air, they needed approval from the government.

From "Meltdown" by Deirdre Langeland



Vocabulary lists containing radioactive