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    radioactive
    /ˌreɪdɪəʊˈaktɪv/

    adjective

    • 1. emitting or relating to the emission of ionizing radiation or particles: "radioactive decay"

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    More definitions, origin and scrabble points

  2. dictionary.cambridge.org › dictionary › englishRADIOACTIVE | English meaning - Cambridge Dictionary

    having or producing powerful and dangerous energy that comes from the breaking up of atoms: Uranium is a radioactive material. radioactive waste. considered extremely dangerous or harmful: The deputies of great dictators often become radioactive by association. Why is this such a radioactive topic?

  3. www.merriam-webster.com › dictionary › radioactiveRadioactive Definition & Meaning - Merriam-Webster

    The meaning of RADIOACTIVE is of, caused by, or exhibiting radioactivity. How to use radioactive in a sentence.

  4. dictionary.cambridge.org › us › dictionaryRADIOACTIVE | definition in the Cambridge English Dictionary

    having or producing powerful and dangerous energy that comes from the breaking up of atoms: Uranium is a radioactive material. radioactive waste. considered extremely dangerous or harmful: The deputies of great dictators often become radioactive by association. Why is this such a radioactive topic?

  5. www.dictionary.com › browse › radioactiveRADIOACTIVE Definition & Meaning | Dictionary.com

    Radioactive definition: of, relating to, exhibiting, or caused by radioactivity. See examples of RADIOACTIVE used in a sentence.

  6. www.britannica.com › science › radioactivityRadioactivity | Definition, Types, Applications, & Facts

    Jun 21, 2024 · radioactivity, property exhibited by certain types of matter of emitting energy and subatomic particles spontaneously. It is, in essence, an attribute of individual atomic nuclei.

  7. www.collinsdictionary.com › dictionary › englishRADIOACTIVE definition and meaning | Collins English Dictionary

    adjective. giving off, or capable of giving off, radiant energy in the form of particles or rays, as alpha, beta, and gamma rays, by the spontaneous disintegration of atomic nuclei. said of certain elements, as plutonium, radium, thorium, and uranium, and their products.

  8. www.vocabulary.com › dictionary › radioactiveRadioactive - Definition, Meaning & Synonyms | Vocabulary.com

    The adjective radioactive is a scientific term for a particular type of energy-emitting substance or thing. Radioactive energy, or radiation, is made up of active particles or electromagnetic waves. Nuclear waste is radioactive, but so are more ordinary things, like cell phones and the food we eat.

  9. www.oxfordlearnersdictionaries.com › definition › englishradioactive adjective - Definition, pictures, pronunciation and...

    Definition of radioactive adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

  10. dictionary.cambridge.org › dictionary › learner-englishRADIOACTIVE | meaning - Cambridge Learner's Dictionary

    RADIOACTIVE definition: containing harmful radiation (= energy from a nuclear reaction): . Learn more.

  11. www.ldoceonline.com › dictionary › radioactiveradioactive | meaning of radioactive in Longman Dictionary of ...

    radioactive meaning, definition, what is radioactive: a radioactive substance is dangerous bec...: Learn more.