electromagnetic radiation

noun

: energy in the form of electromagnetic waves
also : a series of electromagnetic waves

Examples of electromagnetic radiation in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Solar flares are large eruptions of electromagnetic radiation from the sun, which could last from minutes to hours, according to the National Oceanic and Atmospheric Administration's Space Weather Prediction Center. Julia Jacobo, ABC News, 3 Feb. 2026 The report urges officials to address electromagnetic radiation (EMR) exposure stemming from the widespread use of cellphones, Wi-Fi routers, cell towers and wearable, such as smartwatches. Ashley J. Dimella, FOXNews.com, 21 Jan. 2026 This emits massive amounts of electromagnetic radiation out into space and towards our planet. Chris Young, Interesting Engineering, 5 Jan. 2026 Christian Holler, Porsche’s head of charging systems, says the system conforms to International Commission on Non-Ionizing Radiation Protection standards for electromagnetic radiation. IEEE Spectrum, 30 Dec. 2025 See All Example Sentences for electromagnetic radiation

Word History

First Known Use

1891, in the meaning defined above

Time Traveler
The first known use of electromagnetic radiation was in 1891

Browse Nearby Words

Cite this Entry

“Electromagnetic radiation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electromagnetic%20radiation. Accessed 13 Feb. 2026.

Kids Definition

electromagnetic radiation

noun
: energy in the form of electromagnetic waves
also : a series of electromagnetic waves

Medical Definition

electromagnetic radiation

noun
: a series of electromagnetic waves

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