radiation
noun
ra·di·a·tion
ˌrā-dē-ˈā-shən 
1
a
: the action or process of radiating
b
: the process of emitting radiant energy in the form of waves or particles
c(1)
: the combined processes of emission, transmission, and absorption of radiant energy
(2)
: the transfer of heat by radiation compare conduction, convection
2
a
: something that is radiated
b
: energy radiated in the form of waves or particles
3
: radial arrangement
Examples of radiation in a Sentence
She was exposed to high levels of radiation.
He goes in for radiation next week.
the sun's radiation of heat
Recent Examples on the Web
Following her cancer diagnosis, Isabella went through six weeks of radiation, four rounds of chemotherapy and three brain surgeries.
—
Vanessa Etienne, People.com, 20 Nov. 2024
The technique, also known as solar radiation management, encompasses a range of technologies including sunshields in space, marine cloud brightening and stratospheric aerosol injection (SAI).
—Lara Williams, The Mercury News, 15 Nov. 2024
Solar flares are sudden, intense bursts of radiation from the sun's surface, typically as a result of magnetic energy that has built up in the solar atmosphere being suddenly released from sunspots or active regions.
—Thomas G. Moukawsher, Newsweek, 6 Nov. 2024
Like the ants in Them!, these creatures were often caused by radiation.
—Salama Udaipurwala, JSTOR Daily, 30 Oct. 2024
See all Example Sentences for radiation 
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Vanessa Etienne, People.com, 20 Nov. 2024
The technique, also known as solar radiation management, encompasses a range of technologies including sunshields in space, marine cloud brightening and stratospheric aerosol injection (SAI).
—Lara Williams, The Mercury News, 15 Nov. 2024
Solar flares are sudden, intense bursts of radiation from the sun's surface, typically as a result of magnetic energy that has built up in the solar atmosphere being suddenly released from sunspots or active regions.
—Thomas G. Moukawsher, Newsweek, 6 Nov. 2024
Like the ants in Them!, these creatures were often caused by radiation.
—Salama Udaipurwala, JSTOR Daily, 30 Oct. 2024
See all Example Sentences for radiation
Dictionary Entries Near radiation
Cite this Entry
“Radiation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radiation. Accessed 28 Nov. 2024.
Copy CitationKids Definition
radiation
noun
ra·di·a·tion
ˌrād-ē-ˈā-shən
1
: the action or process of radiating
especially
: the process of giving off radiant energy in the form of waves or particles
2
: something that is radiated
especially
: energy radiated in the form of waves or particles
Medical Definition
radiation
noun
ra·di·a·tion
ˌrād-ē-ˈā-shən
1
: energy radiated in the form of waves or particles
2
3
: a tract of nerve fibers within the brain
especially
: one concerned with the distribution of impulses arising from sensory stimuli to the relevant coordinating centers and nuclei
the optic radiations
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