Thesaurus.com
Dictionary.com
Showing results for radioactive. Search instead for radio active.
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.

See Examples For:

Amid ongoing instability, any new natural-uranium reactor would risk radioactive hazards or diversion of material into the wrong hands.

From The Wall Street Journal Aug. 24, 2026

That radioactive spider that transformed Peter Parker into Spider-Man could have bitten the class moron just as easily.

From Salon Aug. 16, 2026

This year marked 40 years since the Chernobyl nuclear accident which caused a reactor to start spewing out radioactive material that would spread across swathes of Europe.

From BBC Aug. 1, 2026

Any comic book fan knows that Spider-Man's secret identity is Peter Parker, a science nerd who gained superhero powers after being bitten by a radioactive spider.

From BBC Jul. 31, 2026

Kennedy couldn’t shake the nightmare image of two people in rags, huddled in radioactive rubble, wondering how they got there.

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin



Vocabulary lists containing radioactive


Vocabulary.com logo
by dictionary.com

Join 14,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training