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Definitions

radioactive

[ray-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.

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Prison bosses later faced formal censure proceedings after inmates and staff were exposed to dangerous levels of the naturally occurring radioactive gas.

From BBC ● Sep. 13, 2026

Poisoned by the overwhelmingly toxic culture of time, the film’s downward-punching humor is as radioactive as its future’s fallow fields.

From Salon ● Sep. 6, 2026

To investigate the mystery, the researchers measured gamma rays produced as a radioactive copper isotope decayed into zinc.

From Science Daily ● Aug. 21, 2026

“I think he’s dangerously tactless in a radioactive topic” and “should exercise more caution,” Steven Pinker, author and Harvard University evolutionary psychologist, says of Cofnas’s rhetoric on genetics’ role in intelligence.

From The Wall Street Journal ● Aug. 21, 2026

The Comprehensive Nuclear-Test-Ban Treaty Organization, which monitors releases of radioactive isotopes around the world, was also watching the unfolding disaster on the eastern coast of Japan.

From "Meltdown" by Deirdre Langeland



Vocabulary lists containing radioactive


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