luminance
noun
lu·mi·nance
ˈlü-mə-nən(t)s 
1
: the quality or state of being luminous
2
: the luminous intensity of a surface in a given direction per unit of projected area
Examples of luminance in a Sentence
the emerald had a pure, icy green luminance
the landscapes of the French painter Claude Lorraine have a unique luminance that no other artist has quite captured
Recent Examples on the Web
The contrast ratio indicates the difference in luminance between the brightest white and the darkest black a monitor can produce.
—
PC Magazine, 31 Mar. 2025
All of these parameters—luminance (brightness), chrominance (color), frame rate, and even laser-pulse rate—will be independently adjustable on future movie projectors.
—IEEE Spectrum, 21 Feb. 2014
About 30 of those hours were dedicated to gathering luminance data, with the remaining time split between red, green, blue and hydrogen-alpha filter exposures.
—Anthony Wood, Space.com, 15 May 2025
Dell rates this ultrawide monitor at 350 nits (candelas per square meter) of brightness, though in our tests, the monitor reached a peak luminance of just 265 nits.
—PC Magazine, 10 Apr. 2025
See All Example Sentences for luminance
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PC Magazine, 31 Mar. 2025
All of these parameters—luminance (brightness), chrominance (color), frame rate, and even laser-pulse rate—will be independently adjustable on future movie projectors.
—IEEE Spectrum, 21 Feb. 2014
About 30 of those hours were dedicated to gathering luminance data, with the remaining time split between red, green, blue and hydrogen-alpha filter exposures.
—Anthony Wood, Space.com, 15 May 2025
Dell rates this ultrawide monitor at 350 nits (candelas per square meter) of brightness, though in our tests, the monitor reached a peak luminance of just 265 nits.
—PC Magazine, 10 Apr. 2025
See All Example Sentences for luminance
Cite this Entry
“Luminance.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/luminance. Accessed 9 Jul. 2025.
Copy CitationMedical Definition
luminance
noun
lu·mi·nance
ˈlü-mə-nən(t)s
1
: the quality or state of being luminous
2
: the luminous intensity of a surface in a given direction per unit of projected area
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