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

Keep scrolling for more

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.
See More
Recent Examples on the Web: Adjective For a budget-friendly option, simply embellish a blue shirt with red duct tape. Katie Bowlby, Country Living, 11 Oct. 2021 She was last seen wearing a blue t-shirt and blue jeans. Nataly Keomoungkhoun, Dallas News, 27 Sep. 2021 The tipster said Ruffo was sitting a few rows up behind home plate and wearing a blue shirt. Fox News, 7 Oct. 2021 In the days that followed, Mr. Simango was often spotted in the streets, his shirt sleeves rolled up and collared blue shirt half unbuttoned and wet with sweat. Ryan Lenora Brown, The Christian Science Monitor, 6 Oct. 2021 Sam Aronson, a political officer at the State Department seen in a helmet and a blue shirt, spoke to Afghans at Abbey Gate, one of the main entrances to the airport, on Aug. 21. Jessica Donati, WSJ, 6 Oct. 2021 At one point, a man in a white shirt shoves a man in a blue shirt. Sylvia Goodman, chicagotribune.com, 5 Oct. 2021 Holding her close, Hall looked ready for the night in aviators, a mustache, a light blue shirt with a deep V neckline and black pants. Greta Bjornson, PEOPLE.com, 4 Oct. 2021 At the news conference, Hutchinson, wearing a blue polo shirt with an Arkansas logo, Arkansas first lady Susan Hutchinson and state Health Secretary Jose Romero received booster shots of the Pfizer vaccine. Andy Davis, Arkansas Online, 29 Sep. 2021 Recent Examples on the Web: Noun The sierra blue on the iPhone 13 Pros is probably my favorite. Brett Molina, USA TODAY, 23 Sep. 2021 And as recently as this weekend while at a national conservative conference in Texas, Republican state leaders renewed their commitment to doing everything in their power to keep Texas from turning blue. Alexa Ura, Chron, 14 July 2021 Fair Fight was indispensable to turning Georgia blue. Washington Post, 28 May 2021 As an impassioned voting rights advocate, Abrams spearheaded one of the biggest upsets of the 2020 election, turning Georgia blue in the presidential race for the first time since 1992. Maureen Lee Lenker, EW.com, 25 Nov. 2020 That's what Stacey Abrams, the former Georgia House of Representatives minority leader who ran for governor of the state in 2018, said four years ago about the prospect of turning Georgia blue. Emma Hinchliffe, Fortune, 6 Nov. 2020 There is rain, torrential downpours that come down out of the blue. NBC News, 8 Oct. 2021 In a flash of white out of the blue, a beluga whale has been seen at least six times around Puget Sound since Sunday, the first such sightings since 1940. Lynda V. Mapes, Anchorage Daily News, 7 Oct. 2021 What’s particularly interesting is that Apple didn’t sit down and decide to create Cinematic mode out of the blue. Yoni Heisler, BGR, 23 Sep. 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.

See More

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

Keep scrolling for more

Learn More About blue

Time Traveler for blue

Time Traveler

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

See more words from the same century

Dictionary Entries Near blue

bludgeon

blue

blue acara

See More Nearby Entries 

Statistics for blue

Last Updated

22 Oct 2021

Cite this Entry

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

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

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

WORD OF THE DAY

Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!