irradiate

verb

ir·​ra·​di·​ate i-ˈrā-dē-ˌāt How to pronounce irradiate (audio)
irradiated; irradiating

transitive verb

1
a
: to affect or treat by radiant energy (such as heat)
specifically : to treat by irradiation
b
: to cast rays of light upon : illuminate
c
: to enlighten intellectually or spiritually
2
: to emit like rays of light : radiate
irradiating strength and comfort

intransitive verb

archaic : to emit rays : shine
irradiative adjective
irradiator noun

Examples of irradiate in a Sentence

The food was irradiated to kill any germs. the light from a galaxy of flashing signs irradiates the heart and soul of Las Vegas
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.
Over time, the neutrons will effectively irradiate the reactor and surrounding materials. New Atlas, 22 Dec. 2024 Where does slushy brine erupt onto the surface, and where do irradiated ice chunks sink into the depths? Jay Bennett, Smithsonian Magazine, 14 Oct. 2024 Instead of using cobalt or other radioactive materials, Wilson’s team uses an X-ray machine to irradiate the pests. Noah Haggerty, Los Angeles Times, 7 Oct. 2024 More than a million breasts stitched, scanned, marked with red-and-blue drawings, irradiated, reconstructed, hidden under blouses and T-shirts, invisible. Annie Ernaux, The New Yorker, 19 Aug. 2024 See all Example Sentences for irradiate 

Word History

Etymology

Latin irradiatus, past participle of irradiare, from in- + radius ray

First Known Use

1603, in the meaning defined at transitive sense 1b

Time Traveler
The first known use of irradiate was in 1603

Dictionary Entries Near irradiate

Cite this Entry

“Irradiate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/irradiate. Accessed 30 Dec. 2024.

Kids Definition

irradiate

verb
ir·​ra·​di·​ate ir-ˈād-ē-ˌāt How to pronounce irradiate (audio)
irradiated; irradiating
1
a
: to cast rays of light on : illuminate
b
: to affect or treat by exposure to radiation (as of ultraviolet light, X-rays, or gamma rays)
2
: to give off like rays of light : radiate
irradiation
-ˌād-ē-ˈā-shən
noun

Medical Definition

irradiate

transitive verb
ir·​ra·​di·​ate ir-ˈād-ē-ˌāt How to pronounce irradiate (audio)
irradiated; irradiating
: to affect or treat by radiant energy (as heat)
specifically : to treat by exposure to radiation (as ultraviolet light or gamma rays)

More from Merriam-Webster on irradiate

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!