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: the attribute of light-source colors by which emitted light is ordered continuously from light to dark in correlation with its intensity compare hue sense 2c, lightness entry 1 sense 2a, saturation sense 4
Examples of brightness in a Sentence
the brightness of the sunshine made me squint after an afternoon spent in a darkened movie theater
Recent Examples on the Web
This is equivalent to a quadrupling of sky brightness over the duration of a human childhood (18 years).
—
Laurie Winkless, Forbes.com, 23 July 2025
The team also compared the surface brightness of TOI 1227 with models of stellar evolution.
—Robert Lea, Space.com, 18 July 2025
For a full meal, serve with rice and a squeeze of lime for an extra shot of brightness.
—The New York Times News Service Syndicate, Denver Post, 16 July 2025
Original price: $70 This dimmable table lamp offers low, medium and high brightness options.
—Christopher Murray
May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 14 July 2025
See All Example Sentences for brightness
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Laurie Winkless, Forbes.com, 23 July 2025
The team also compared the surface brightness of TOI 1227 with models of stellar evolution.
—Robert Lea, Space.com, 18 July 2025
For a full meal, serve with rice and a squeeze of lime for an extra shot of brightness.
—The New York Times News Service Syndicate, Denver Post, 16 July 2025
Original price: $70 This dimmable table lamp offers low, medium and high brightness options.
—Christopher Murray
May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 14 July 2025
See All Example Sentences for brightness
Cite this Entry
“Brightness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brightness. Accessed 29 Jul. 2025.
Copy CitationMedical Definition
brightness
noun
bright·ness
ˈbrīt-nəs 
: the one of the three psychological dimensions of color perception by which visual stimuli are ordered continuously from light to dark and which is correlated with light intensity compare hue, saturation sense 4a
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