American Dictionary

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Definition radiation in American English

radiation noun

[uncountable] noun
/ˌreɪdiˈeɪʃ(ə)n/
1

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

Example

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

Example

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

1.1

consisting of radiation, or caused by radiation

Example

a radiation leak

Synonyms and related words
2

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

Example

ultraviolet radiation from the sun

Synonyms and related words
Definition radiation in American English