1
2
: 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
Synonyms
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
When to watch Venus at its brightest The second planet from the sun will be at its brightest near Valentine’s Day in 2025, the Almanac said.
Stargazers can glimpse Venus at its greatest brightness on Sunday, Feb. 16.
—
Hannah Poukish, Sacramento Bee, 31 Jan. 2025
Venus will be near its maximum brightness, while the moon is both in its waxing crescent phase and at its monthly 'perigee'—its closest approach to Earth—10,500 miles nearer than average at 228,000 miles.
—Dan Perry, Newsweek, 31 Jan. 2025
On Valentine's Day (Feb. 14), its cloudy disk will be 27% illuminated and shrinking nightly but its diminishing phase exactly offsets the gain in brightness from its growing apparent size.
—Joe Rao, Space.com, 31 Jan. 2025
It’s got everything from superior brightness, great HDR support, 4K resolution, and sleek, easy-to-use smart features.
—Shubham Yewale, PCMAG, 29 Jan. 2025
See all Example Sentences for brightness 
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.
Hannah Poukish, Sacramento Bee, 31 Jan. 2025
Venus will be near its maximum brightness, while the moon is both in its waxing crescent phase and at its monthly 'perigee'—its closest approach to Earth—10,500 miles nearer than average at 228,000 miles.
—Dan Perry, Newsweek, 31 Jan. 2025
On Valentine's Day (Feb. 14), its cloudy disk will be 27% illuminated and shrinking nightly but its diminishing phase exactly offsets the gain in brightness from its growing apparent size.
—Joe Rao, Space.com, 31 Jan. 2025
It’s got everything from superior brightness, great HDR support, 4K resolution, and sleek, easy-to-use smart features.
—Shubham Yewale, PCMAG, 29 Jan. 2025
See all Example Sentences for brightness
Dictionary Entries Near brightness
Cite this Entry
“Brightness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brightness. Accessed 8 Feb. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share