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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 enough brightness, potentially, to leave the M2 Pro watchable in rooms that aren’t completely blacked out – another handy lifestyle touch.
—
John Archer, Forbes.com, 5 June 2025
This contrasts with a more standard black hole that typically acquires its material and energy unpredictably, resulting in irregular brightness fluctuations.
—Andrew Paul, Popular Science, 4 June 2025
Think of hitting the reset button on your bed, then, as yet another way to treat yourself after winter’s many cold months: starting everyone’s favorite time of the year on a fresh foot while keeping lightness and brightness at the heart of your style transformation.
—Stacia Datskovska, Footwear News, 3 June 2025
These zones can adjust screen brightness, turn volume up and down, or scrub forward and back through media.
—PC Magazine, 29 May 2025
See All Example Sentences for brightness
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John Archer, Forbes.com, 5 June 2025
This contrasts with a more standard black hole that typically acquires its material and energy unpredictably, resulting in irregular brightness fluctuations.
—Andrew Paul, Popular Science, 4 June 2025
Think of hitting the reset button on your bed, then, as yet another way to treat yourself after winter’s many cold months: starting everyone’s favorite time of the year on a fresh foot while keeping lightness and brightness at the heart of your style transformation.
—Stacia Datskovska, Footwear News, 3 June 2025
These zones can adjust screen brightness, turn volume up and down, or scrub forward and back through media.
—PC Magazine, 29 May 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 8 Jun. 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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