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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.

But then, he predicted that industries would start using uranium and radium, and pretty soon we’d have … radioactive smog.

From Los Angeles Times • Mar. 26, 2026

The U.S. military has elite teams specially trained to remove radioactive material from a conflict zone.

From The Wall Street Journal • Mar. 15, 2026

Herrera was certainly the less radioactive candidate of the two.

From Slate • Mar. 9, 2026

In the end, Fennell took home the statue for best original screenplay, cementing her prowess in Oscar gold — and turning herself radioactive forevermore.

From Salon • Feb. 23, 2026

If left alone, the groundwater would continue to flow toward the sea, carrying radioactive isotopes from the reactors with it, so workers pumped hundreds of gallons of water from the reactor basements every day.

From "Meltdown" by Deirdre Langeland