radiation - definition and synonyms

noun [uncountable] 

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  1. 1
    chemistry a form of energy produced during a nuclear reaction that is used for making electrical power but can also kill or harm humans who receive too much of it

    There is a clear link between exposure to radiation and some forms of cancer.

    Some workers at the power station were exposed to high levels of radiation.

    1. a.
      [only before noun] consisting of radiation, or caused by radiation

      a radiation leak

  2. 2
    physics a type of energy that is sent out in the form of electromagnetic waves, for example, heat, light, or radio waves

    ultraviolet radiation from the sun

See also