ultraviolet
adjective
ul·tra·vi·o·let
ˌəl-trə-ˈvī-(ə-)lət 
1
: situated beyond the visible spectrum at its violet end
—used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays
2
: relating to, producing, or employing ultraviolet radiation
ultraviolet
noun
Examples of ultraviolet in a Sentence
Recent Examples on the Web
If the color is greenish, then the comet is emitting diatomic carbon (C2) gas, which glows characteristically green when excited by the sun's ultraviolet light.
—
Joe Rao, Space.com, 11 Apr. 2025
Cover The best smokeless fire pits include a cover, with the best covers having weather and ultraviolet light protection plus a method to secure the cover in place.
—Bestreviews, Chicago Tribune, 8 Apr. 2025
An ultraviolet light treatment process will be updated soon, with the State Revolving Fund closing on a loan for that equipment recently as well as the northside interceptor and lift stations.
—Doug Ross, Chicago Tribune, 2 Apr. 2025
The recent sighting of ultraviolet light from this distant galaxy — called JADES-GS-z13-1 — has astonished researchers, shattering prior expectations of early galaxy formation.
—Jack Knudson, Discover Magazine, 27 Mar. 2025
See All Example Sentences for ultraviolet
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Joe Rao, Space.com, 11 Apr. 2025
Cover The best smokeless fire pits include a cover, with the best covers having weather and ultraviolet light protection plus a method to secure the cover in place.
—Bestreviews, Chicago Tribune, 8 Apr. 2025
An ultraviolet light treatment process will be updated soon, with the State Revolving Fund closing on a loan for that equipment recently as well as the northside interceptor and lift stations.
—Doug Ross, Chicago Tribune, 2 Apr. 2025
The recent sighting of ultraviolet light from this distant galaxy — called JADES-GS-z13-1 — has astonished researchers, shattering prior expectations of early galaxy formation.
—Jack Knudson, Discover Magazine, 27 Mar. 2025
See All Example Sentences for ultraviolet
Cite this Entry
“Ultraviolet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultraviolet. Accessed 20 Apr. 2025.
Copy CitationKids Definition
ultraviolet
adjective
ul·tra·vi·o·let
ˌəl-trə-ˈvī-ə-lət
1
: located beyond the visible spectrum at its violet end and having a wavelength shorter than those of visible light but longer than those of X-rays
2
: relating to, producing, or using ultraviolet radiation
ultraviolet
noun
Medical Definition
ultraviolet
1 of 2 adjective
ul·tra·vi·o·let
ˌəl-trə-ˈvī-(ə-)lət
1
: situated beyond the visible spectrum at its violet end
—used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays
2
: relating to, producing, or employing ultraviolet radiation
ultraviolet
2 of 2 noun
: ultraviolet radiation
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