blue

adjective
\ ˈblü How to pronounce blue (audio) \
bluer; bluest

Definition of blue

 (Entry 1 of 3)

1 : of the color whose hue is that of the clear sky : of the color blue (see blue entry 2 sense 1) a blue jacket her bright blue eyes The house is blue with white shutters.
2a : bluish the blue haze of tobacco smoke
b : discolored by or as if by bruising blue with cold
c : bluish gray a blue cat
3a : low in spirits : melancholy has been feeling blue
b : marked by low spirits : depressing a blue funk things looked blue
4 : wearing blue the blue team
5 of a woman : learned, intellectual … the ladies were very blue and well-informed …— W. M. Thackeray
6 : puritanical … a blue Sunday city …— James Street
7a : profane, indecent a blue movie
b : off-color, risqué blue jokes
8 music : of, relating to, or used in blues (see blues sense 3) a blue song
9 US politics : tending to support Democratic candidates or policies As has become increasingly clear over the past few general elections, with their red states and blue states, an American Presidential campaign is no longer truly national.— Hendrik Hertzberg — compare purple sense 3, red sense 5
blue in the face
: extremely exasperated argued until he was blue in the face

blue

noun

Definition of blue (Entry 2 of 3)

1 : a color whose hue is that of the clear sky or that of the portion of the color spectrum lying between green and violet Blue is his favorite color. shades of blue
2a : a pigment or dye that colors blue
b : bluing adding blue to the laundry
3a : blue clothing or cloth will be wearing blue
b blues plural : a blue costume or uniform wearing their dress blues
4a : a Union soldier in the American Civil War
b often capitalized : the Union army the Blue versus the Gray
5a(1) : sky
(2) : the far distance disappeared into the blue
b : sea
6 : a blue object
7 : bluestocking praised the writings of her fellow blues
8 biology : any of numerous small chiefly blue butterflies (family Lycaenidae)
9 : bluefish fishing for blues
11 physics : one of the three colors (see color entry 1 sense 15) that quarks have in the theory of quantum chromodynamics One cannot have a single quark on its own because it would have a color (red, green, or blue). Instead, a red quark has to be joined to a green and a blue quark by a "string" of gluons (red + green + blue = white). Such a triplet constitutes a proton or a neutron.— Stephen Hawking
out of the blue
: without advance notice : unexpectedly the job offer came out of the blue

blue

verb
blued; blueing or bluing; blues

Definition of blue (Entry 3 of 3)

transitive verb

: to make (something) blue in color: such as
a : to dye, tint, or paint (something) blue Last, the generation of the grandmothers, in immaculately blued hair …— John Updike Tattoos blued his upper arms.— Jerry Spinelli
b : to heat (iron or steel) to about 550 to 600 degrees Fahrenheit so that it acquires a protective bluish coating the blued barrel of the gun Between banks shrouded with snow, the river gleamed darkly, like blued steel with gold chips of sunlight dancing on each riffle.— Pete Bodo

intransitive verb

: to turn blue their blueing fingers
blue the air
informal
: to curse angrily He sliced the air with his fists and blued the air with his mouth.— Steve Kelley I have been stealing my father's copy (of Massachusetts Wildlife) for a long time, but last week he found an issue on my desk and blued the air a bit.— Stephen King Donovan

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Other Words from blue

Adjective

bluely adverb
blueness noun

Examples of blue in a Sentence

Adjective shocked at the blue banter she heard on that satellite-radio talk show a cold, dreary day always leaves me blue Noun Her favorite color is blue. a mixture of blues and greens They sailed off into the blue.
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Recent Examples on the Web: Adjective To the side of Skaros sits a picture-perfect, white and blue Greek church. Nina Ruggiero, Travel + Leisure, 11 Sep. 2021 The stage features 360-degree camera views, a catwalk for talent and a revolving neon red-white-and-blue NFL logo — hauled in from Nashville after the 2019 NFL Draft. Jack Flemming, Los Angeles Times, 11 Sep. 2021 Instead of seeing fans flood the gates with the colors of their favorite drivers, everyone wore red, white and blue. Joseph Wolkin, Forbes, 10 Sep. 2021 Others kept a red, white and blue U.S. flag on a pole fluttering in the breeze. Dianne Solis, Dallas News, 7 Sep. 2021 The white and blue materials are complemented by rose gold accents. Jens Meiners, Car and Driver, 5 Sep. 2021 Three white-and-blue buses were parked outside of the community center Tuesday afternoon, and people were walking in and out of the building with various belongings. J.d. Morris, San Francisco Chronicle, 31 Aug. 2021 As per Browne, this year’s design (white over the brand’s iconic dark grey with red, white and blue trim) was inspired by the Olympics and classic American sportswear. Rachel Besser, Vogue, 31 Aug. 2021 Department of Justice Dempsey became known as #FlagGaiterCopHater on social media due to his distinctive red, white and blue face covering, according to a criminal complaint. NBC News, 27 Aug. 2021 Recent Examples on the Web: Noun Far away beyond the skyline was disease, stress and uncertainty; on this unusual cruise, drinks flowed, people had fun, and life was good in a brief bubble of normality, floating in the endless blue of the South China Sea. Tara Mulholland, CNN, 12 Sep. 2021 On the other side of the doors, which open automatically upon the driver’s approach, the interior is dressed in white and dark blue with rose-gold accents. Viju Mathew, Robb Report, 10 Sep. 2021 Pantone 294, a Dodgers fan group named after the team’s famous color, claimed to have grabbed about 1,500 seats in the bleachers — and the blue in the crowd was much more widespread than the night before. Ann Killion, San Francisco Chronicle, 4 Sep. 2021 Today, the rich blue is popular with collectors, and the decoration is charming. Helaine Fendelman And Joe Rosson, Star Tribune, 27 July 2021 Some might single out the lightness of the air, others the snowy-white clouds and, still others, the skies of clear blue in which those clouds drifted and shifted their shapes. Washington Post, 4 July 2021 Simply put, no one really knows why light blue is the color of choice for manicures. Samantha Olson, Seventeen, 26 May 2021 The cyan blue could also be mixed with other natural dyes to make more vibrant colors. Lana Bandoim, Forbes, 25 May 2021 The park’s two lakes, previously clogged with algae and sediment, are now a clear blue. Los Angeles Times, 20 May 2021 Recent Examples on the Web: Verb The home uniforms, which FAU wore versus the 49ers, have blue as the dominant color once again. Khobi Price, sun-sentinel.com, 3 Oct. 2020 To ensure that John Cornyn, Chip Roy and the rest of the Texas Republicans stop putting us in danger, voter blue up and down the ballot in November. Taylor Goldenstein, ExpressNews.com, 26 Aug. 2020 There are signs that Texas, due to changing demographics, may be the next Electoral College giant to turn from red, if not to blue, then at least to purple. John A. Farrell, The New Republic, 16 Apr. 2020 So why won't blue shampoo cut it for keeping cool brunettes cool? Taylore Glynn, Marie Claire, 23 Jan. 2020 Ruscillo has studied the production of the ancient purple dye, including experimenting with it to make colors from pink to blue to almost black, though she isn't involved in the excavations on Chrysi. Fox News, 12 Dec. 2019 The pair were all smiles for the appearance at St. James’s Palace, where Kate blue a royal blue Issa dress that matched her sapphire engagement ring, which once belonged to William’s mother Princess Diana. Stephanie Petit, PEOPLE.com, 25 July 2019 Give classic orange and blue a dose of edge with abstract prints and a hit of dark à la Samantha Angelo. Laurel Benedum, ELLE Decor, 4 June 2019 Stop painting the same models blue and calling it revolutionary. Sandra Salibian | Wwd, latimes.com, 26 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'blue.' 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 blue

Adjective

13th century, in the meaning defined at sense 1

Noun

14th century, in the meaning defined at sense 1

Verb

1606, in the meaning defined at transitive sense

History and Etymology for blue

Adjective, Noun, and Verb

Middle English, from Anglo-French blef, blew, of Germanic origin; akin to Old High German blāo blue; akin to Latin flavus yellow

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Time Traveler for blue

Time Traveler

The first known use of blue was in the 13th century

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Dictionary Entries Near blue

bludgeon

blue

blue acara

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Statistics for blue

Last Updated

16 Sep 2021

Cite this Entry

“Blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue. Accessed 26 Sep. 2021.

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More Definitions for blue

blue

adjective

English Language Learners Definition of blue

 (Entry 1 of 2)

: having the color of the clear sky
: sad or unhappy

blue

noun

English Language Learners Definition of blue (Entry 2 of 2)

: the color of the clear sky
: the sky or the sea

blue

noun
\ ˈblü How to pronounce blue (audio) \

Kids Definition of blue

 (Entry 1 of 2)

1 : the color of the clear daytime sky
2 : blue clothing or cloth
out of the blue
: suddenly and unexpectedly

Other Words from blue

bluish adjective

blue

adjective
bluer; bluest

Kids Definition of blue (Entry 2 of 2)

1 : of the color of the sky : of the color blue blue ink
2 : sad sense 1 Why are you so blue?

blue

adjective
\ ˈblü How to pronounce blue (audio) \
bluer; bluest

Medical Definition of blue

 (Entry 1 of 2)

: of the color blue

blue

noun

Medical Definition of blue (Entry 2 of 2)

1 : a color whose hue is that of the clear sky or that of the portion of the color spectrum lying between green and violet
2 : a pigment or dye that colors blue — see prussian blue

More from Merriam-Webster on blue

Nglish: Translation of blue for Spanish Speakers

Britannica English: Translation of blue for Arabic Speakers

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