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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.

To avoid creating and managing radioactive waste, TAE wants to use a fuel that requires far hotter plasmas than other fusion companies aim for, posing a bigger physics challenge.

From The Wall Street Journal • Mar. 28, 2026

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

Herrera was certainly the less radioactive candidate of the two.

From Slate • Mar. 9, 2026

A 22-metre robot arm will help remove a third sample of radioactive debris from inside Japan's stricken Fukushima nuclear plant, its operator said Thursday, as it unveiled the snake-like device.

From Barron's • Feb. 26, 2026

He takes a tiny bite of his taco and chews as if he’s afraid the stuff is radioactive.

From "Linked" by Gordon Korman