bright·​ness | \ ˈbrīt-nəs \

Definition of brightness

1a : the quality or state of being bright also : an instance of such a quality or state
b : luminance
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 2, saturation sense 4

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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

From designer baubles that will bring high fashion to your tree, to beautifully hand-crafted ornaments from Peru, here are the very best bits of brightness to dress up your tree this season. Anny Choi, Vogue, "Christmas Tree Ornaments So Fabulous You’ll Want to Admire Them All Year Long," 5 Dec. 2018 But for an exoplanet with a moon, the brightness dips don’t seem to follow an orderly scheme. Loren Grush, The Verge, "Astronomers may have discovered the first moon ever found outside our Solar System," 3 Oct. 2018 The art in the collection comes from three female artists — Anna Panchenko, by robynblair, and Katy Hirschfeld — and each of the prints is sure to add a solid dose of brightness to your dorm or apartment walls. Emma Sarran Webster, Teen Vogue, "Dormify Collaborates with ArtSugar on Collection Benefiting Girls Who Code," 22 July 2018 Being slapped, choked, spit on, and called racial slurs out of nowhere by a drunk person with no prior discussion of kink or role play is a red light of volcanic brightness. Alexa Tsoulis-reay, The Cut, "Here’s How Consent and BDSM Role-Play Actually Work," 9 May 2018 Its briny flavor adds brightness spread on a baguette and stacked with meat and cheese. Elaine Johnson, Sunset, "10 Ideas for Building the Perfect Charcuterie Board," 22 Jan. 2018 Initially, the spacecraft stared at more than 150,000 stars simultaneously, watching for tiny brightness dips that could indicate the passage of orbiting planets across these stars' faces. Mike Wall,, "NASA's Kepler Planet-Hunting Space Telescope Wakes Up Again," 13 Oct. 2018 If your screen's brightness is markedly different than the light around it, your eyes have to work harder to see, the AAO explains. Korin Miller, SELF, "7 Ways to Keep Your Eyes Comfortable If You Work at Computer All Day," 5 Oct. 2018 But during a lunar eclipse, the glow of the moon has a much less intense brightness than the sun. Time, "Practically Everyone in the World Will See the Longest Eclipse of the Century on July 27. Here's What to Know," 3 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'brightness.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of brightness

before the 12th century, in the meaning defined at sense 1a

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Last Updated

14 Jan 2019

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Time Traveler for brightness

The first known use of brightness was before the 12th century

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More Definitions for brightness


bright·​ness | \ ˈbrīt-nəs \

Medical Definition of brightness

: 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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someone who never drinks alcohol

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