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

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.
Recent Examples on the Web: Adjective This blue-collar city of about 60,000 north of Boston is one of the most diverse municipalities in Massachusetts, with at least 70 languages spoken in its public schools, and an ever-changing mix of new arrivals putting down roots. Tim Logan, BostonGlobe.com, 4 May 2022 Police described Swendiman as 5-foot-8, 160 pounds with graying brown hair and blue eyes. Anchorage Daily News, 3 May 2022 The usual red/blue check divide broke out, of course. Joseph Pisani, WSJ, 27 Apr. 2022 The first-ever Barbie had blond hair, blue eyes and was wearing a bathing suit. Lianne Kolirin, CNN, 27 Apr. 2022 The sweet photos pan through the years, and eventually, that same close-up goes to Beckett — who also has his father's blue eyes. Daniela Avila, PEOPLE.com, 20 Apr. 2022 When his wife, Yulia, approached the body, her blue eyes froze. Washington Post, 16 Apr. 2022 Peck wore a series of leather masks with strips of dangling bordello fringe, which obscured most of his features, but not his searching blue eyes. Amanda Petrusich, The New Yorker, 9 Apr. 2022 Theo has a light complexion with brown hair and blue eyes, police said. Los Angeles Times, 5 Apr. 2022 Recent Examples on the Web: Noun Employee discomfort doesn’t come out of the blue–so look for signs of it. Mia Vasser, Fortune, 4 May 2022 The pretty blue is so soothing during stressful travel. Lois Alter Mark, Forbes, 1 May 2022 In the middle of lockdown, there were a couple of Zoom auditions that came out of the blue. Brent Lang, Variety, 22 Apr. 2022 In the brief, six-second snippet, the rising pop star sits on the end of a bench, licking a chocolate ice cream cone in an all-white suit when, out of the blue, a bright red grand piano drops out of the sky onto his head. Glenn Rowley, Billboard, 19 Apr. 2022 Now, without a schedule to adhere to, there’s more pressure to feel turned on and ready out of the blue. refinery29.com, 13 Apr. 2022 Marco showed up, out of the blue, said his piece and was killed off just like that. Erik Kain, Forbes, 12 Apr. 2022 This casual prejudice was the reason Leka accepted an interview request out of the blue from a British writer at an American magazine. Helen Lewis, The Atlantic, 12 Apr. 2022 Frankly, the biggest storyline of the next week appeared out of the blue in the third quarter of the Mavericks/Spurs contest, when Luka Doncic strained his left calf. Andy Larsen, The Salt Lake Tribune, 11 Apr. 2022 Recent Examples on the Web: Verb Republicans in Virginia’s 10th, 7th and 2nd districts — all seats targeted by the national GOP — are seeking to unseat the three Democratic congresswomen who flipped their districts to blue in 2018 with major help from suburban voters. Washington Post, 14 Mar. 2022 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 See More

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.

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

7 May 2022

Cite this Entry

“Blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue. Accessed 16 May. 2022.

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More Definitions for blue

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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