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1. The state or quality of being bright.
2. The effect or sensation by means of which an observer is able to distinguish differences in luminance.
3. The dimension of a color that represents its similarity to one of a series of achromatic colors ranging from very dim (dark) to very bright (dazzling).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. the condition of being bright
2. (General Physics) physics a former name for luminosity4
3. (Psychology) psychol the experienced intensity of light
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈbraɪt nɪs)

1. the quality of being bright.
2. the luminance of a body that an observer uses to determine the comparative luminance of another body.
[before 950]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.




  1. Blazing like the windows of the city —James Dickey
  2. (He possessed a brainful of information,) bright and beautiful as diamonds swaddled in midnight-blue velvet —W. P. Kinsella
  3. Bright and light as the crest of a peacock —Alfred, Lord Tennyson
  4. Bright and pleasing as a child’s rattle —Virginia Woolf
  5. Bright as a beach in the moonlight —Alfred Austin
  6. (An image came to me across the years,) bright as a coin from the mint —Norman Mailer
  7. Bright as a frog’s eyes —Hart Crane
  8. Bright as all between cloudless skies and windless streams —Percy Bysshe Shelley
  9. Bright as a nettle rash —Diane Ackerman
  10. (Laugh … ) bright as a new ensign’s buttons —Frederic Wakeman
  11. Bright as a newly painted toy —Hugh Walpole
  12. Bright as an icon —Margaret Atwood
  13. Bright as any glass —Geoffrey Chaucer
  14. Bright as any meteor ever bred by the North Pole —Lord Byron
  15. Bright as a parakeet —Dame Edith Sitwell
  16. (Every day) bright as a postcard —Karl Shapiro
  17. Bright as a roomful of chrystal chandeliers —Anon
  18. Bright as a splinter from a glazier’s table —Beryl Markham
  19. (A face) bright as a waterdrop —Padraic Fallon
  20. Bright as day —Geoffrey Chaucer
  21. Bright as foil —Molly Giles
  22. Bright as freedom —Marge Piercy
  23. Bright as joy —Hartley Coleridge
  24. Bright as light —Alfred, Lord Tennyson
  25. Bright as moonlight over snow —Wallace Stegner
  26. Bright as Spring —Walter Savage Landor
  27. (Eyes as) bright as the Dipper —Stephen Vincent Benét
  28. Bright as the fullest moon in blackest air —Arabian Nights
  29. Bright as the promises of a new administration —Elyse Sommer
  30. Bright as the promise of life on commencement day —Elyse Sommer
  31. Bright as the promise of a cloudless day —C. P. Wilson
  32. Bright as the raindrops and roses in June —Dame Edith Sitwell
  33. Bright as the world was in its infant years —John Banks
  34. Bright as truth —Barry Cornwall
  35. Bright like a brimming bowl of jewels —Peter De Vries
  36. Bright, like a flash of sunlight —Edward Bulwer-Lytton
  37. Bright (eyes) like agate —D. H. Lawrence
  38. Bright like blood —Algernon Charles Swinburne
  39. Brightness … bright as dipper —Stephen Vincent Benet
  40. Brilliant as a postage stamp —Lawrence Durrell
  41. (Eyes) brilliant as fire —Nadine Gordimer
  42. [Oranges and grapefruits] brilliant as planets —Cynthia Ozick
  43. Brilliant as the stars —Ouida
  44. Brilliant as the sun —Slogan, Lustberg-Nast, Lustray shirts
  45. Brilliant like a Chinese porcelain —W. Somerset Maugham
  46. Brilliantly, gaudily colored as a Gypsy camp —Kate Simon
  47. Dazzled the eyes like a second noonday sun —Edna Ferber
  48. Growing brighter and brighter like a forest after a rain —Denis Johnson
  49. Lights up like a Star Wars pinball machine —Marge Piercy
  50. [Face] light up like a bonfire of joy —Carl Sandburg
  51. Vivid as sun through a thin brown bottle —Reynolds Price
  52. Vivid as the granules of paint in a Dubuffet —John Updike
Similes Dictionary, 1st Edition. © 1988 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.brightness - the location of a visual perception along a continuum from black to white
lightness, light - the visual effect of illumination on objects or scenes as created in pictures; "he could paint the lightest light and the darkest dark"
brilliance, glare, blaze - a light within the field of vision that is brighter than the brightness to which the eyes are adapted; "a glare of sunlight"
dazzle - brightness enough to blind partially and temporarily
glisten, glister, glitter, sparkle, scintillation - the quality of shining with a bright reflected light
flash - a momentary brightness
glint - a spatially localized brightness
iridescence, opalescence - the visual property of something having a milky brightness and a play of colors from the surface
radiancy, refulgence, refulgency, shine, effulgence, radiance - the quality of being bright and sending out rays of light
brilliancy, luster, splendor, splendour, lustre - a quality that outshines the usual
dullness - a lack of visual brightness; "the brightness of the orange sky was reflected in the dullness of the orange sea"
2.brightness - intelligence as manifested in being quick and witty
intelligence - the ability to comprehend; to understand and profit from experience
3.brightness - the quality of being luminousbrightness - the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun"
physical property - any property used to characterize matter and energy and their interactions
illuminance, illumination - the luminous flux incident on a unit area
incandescence - light from heat
glow, luminescence - light from nonthermal sources
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


1. vividness, richness, intensity, brilliance, splendour, resplendence You'll be impressed with the brightness of the colors.
2. light, shine, sparkle, glare, brilliance, radiance, luminosity, incandescence, effulgence, refulgence An astronomer can determine the brightness of each star.
light dullness, dimness
3. intelligence, intellect, brains (informal), awareness, sharpness, alertness, cleverness, quickness, acuity, brain power, smarts (slang, chiefly U.S.), smartness Her brightness seemed quite intimidating to me.
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002
لَمَعان، إشْراق، سُطوع
ljómi, birta


A. N
1. [of light, sun, fire, eyes, metal] → brillo m, resplandor m; [of morning, day] → claridad f, luminosidad f; [of colour] → viveza f
2. (= cheerfulness) → alegría f, animación f
3. (= cleverness) → inteligencia f
4. (= promise) [of future, prospects] → lo prometedor
B. CPD brightness control N (TV) → botón m de ajuste del brillo
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005


[ˈbraɪtnɪs] n
[colour] → éclat m
[star] → luminosité f
[light] → intensité fbright spark npetit(e) futé(e) m/f
Collins English/French Electronic Resource. © HarperCollins Publishers 2005


(of light, fire)Helligkeit f; (of colour)Leuchten nt; (of sunshine, star also, eyes, gem)Strahlen nt; (of day, weather)Heiterkeit f; (of reflection)Stärke f; (of metal)Glanz m; brightness controlHelligkeitsregler m
(= cheerfulness: of person, smile) → Fröhlichkeit f, → Heiterkeit f
(= intelligence, of person) → Intelligenz f; (of child)Aufgewecktheit f
(of prospects)Freundlichkeit f; the brightness of the futuredie glänzende Zukunft
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007


[ˈbraɪtnɪs] n (of room) → luminosità; (of eyes, star) → lucentezza; (of sunshine) → splendore m; (of flame, colour) → vivacità
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995


(brait) adjective
1. shining with much light. bright sunshine.
2. (of a colour) strong and bold. a bright red car.
3. cheerful. a bright smile.
4. clever. bright children.
ˈbrightly adverb
ˈbrightness noun
ˈbrighten verb
(often with up) to make or become bright or brighter. The new wallpaper brightens up the room.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
References in classic literature ?
When we see a Line, we see something that is long and BRIGHT; BRIGHTNESS, as well as length, is necessary to the existence of a Line; if the brightness vanishes, the Line is extinguished.
She gives kindly gifts to men: smiles are ever on her lovely face, and lovely is the brightness that plays over it.
adorned with all the charms in which nature can array her; bedecked with beauty, youth, sprightliness, innocence, modesty, and tenderness, breathing sweetness from her rosy lips, and darting brightness from her sparkling eyes, the lovely Sophia comes!
But in this middle fluid travelled over by the Nautilus, the electric brightness was produced even in the bosom of the waves.
"Yes," I said, "perfectly,--'The presbytery has lost nothing of its charm, nor the garden its brightness.' It was the phrase which you found on the half-burned piece of paper amongst the ashes in the laboratory."
But while hapless Dough-Boy was by nature dull and torpid in his intellects, Pip, though over tender-hearted, was at bottom very bright, with that pleasant, genial, jolly brightness peculiar to his tribe; a tribe, which ever enjoy all holidays and festivities with finer, freer relish than any other race.
The city of Wintoncester, that fine old city, aforetime capital of Wessex, lay amidst its convex and concave downlands in all the brightness and warmth of a July morning.
The decision once made, a glow of strange enjoyment threw its flickering brightness over the trouble of his breast.
Suddenly, as he spoke, a great brightness fell about him, causing him to look upward, thinking the sun had burst through a rift in the clouds; but there were no clouds.
Something strangely powerful there was in the light of Stephen's long gaze, for it made Maggie's face turn toward it and look upward at it, slowly, like a flower at the ascending brightness. And they walked unsteadily on, without feeling that they were walking; without feeling anything but that long, grave, mutual gaze which has the solemnity belonging to all deep human passion.
It had a greenish colour, and caused a silent brightness like summer lightning.
I remember the time by the sudden brightness and clearness, the feverish strain and excitement of all my faculties which came with it.