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
Although Webb saw the auroras on Jupiter in 2023, the Hubble Space Telescope did not — despite the same observations being made simultaneously in the ultraviolet light by both space observatories.
—
Jamie Carter, Forbes.com, 16 May 2025
Solar flares are bursts on the sun’s surface that send electromagnetic radiation, including X-rays and extreme ultraviolet radiation (EUV), hurtling through space—and sometimes, they’re pointed at Earth.
—Margherita Bassi, Smithsonian Magazine, 16 May 2025
Experts agree that time spent outside can potentially expose the skin to more ultraviolet (UV) light rays from the sun, causing sunburn.
—Kelly Burch Published, Verywell Health, 13 May 2025
Predicting Auroras On Mars Until now, the only auroras on Mars have been detected at ultraviolet wavelengths by spacecraft orbiting the red planet.
—Jamie Carter, Forbes.com, 18 May 2025
See All Example Sentences for ultraviolet
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.
Jamie Carter, Forbes.com, 16 May 2025
Solar flares are bursts on the sun’s surface that send electromagnetic radiation, including X-rays and extreme ultraviolet radiation (EUV), hurtling through space—and sometimes, they’re pointed at Earth.
—Margherita Bassi, Smithsonian Magazine, 16 May 2025
Experts agree that time spent outside can potentially expose the skin to more ultraviolet (UV) light rays from the sun, causing sunburn.
—Kelly Burch Published, Verywell Health, 13 May 2025
Predicting Auroras On Mars Until now, the only auroras on Mars have been detected at ultraviolet wavelengths by spacecraft orbiting the red planet.
—Jamie Carter, Forbes.com, 18 May 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 5 Jun. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share