radioactive Meaning in Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of "radioactive" - English Dictionary

See all translations

radioactiveadjective

uk   /ˌreɪ.di.əʊˈæk.tɪv/  us   /-oʊ-/
having or producing the energy that comes from the breaking up of atoms: Uranium is a radioactive material. radioactive waste
(Definition of radioactive from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of radioactive?
Add Cambridge dictionaries to your browser to your website

Definitions of “radioactive” in other dictionaries

Word of the Day
social security

a system of payments made by the government to people who are ill, poor, or who have no job

Word of the Day

Are you a glass-half-full person? (Everyday Idioms)
Are you a glass-half-full person? (Everyday Idioms)
by Kate Woodford,
July 29, 2015
A reader of this blog recently asked for a post on idioms that are used in everyday English. This seemed like a reasonable request. After all, if you are going to make the effort to learn a set of English idioms, you want those idioms to be useful. The question, then, was

Read More 

responsible luxury noun
responsible luxury noun
August 03, 2015
high-end, green tourism and hospitality Jumeirah’s ‘responsible luxury’ approach is an example of a sustainable travel experience – future guests will enjoy the environment as much as today’s.

Read More