\ 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 Vivian said of Mackie’s leggings, and pulled on a blue T-shirt and a black hoodie with a little maple leaf logo. Annie Hylton, Longreads, "Searching For Mackie," 12 Feb. 2020 His supporters, wearing golden yellow baseball caps and blue T-shirts, warmed up the crowd with chants before Mr. Buttigieg took the stage. Tarini Parti, WSJ, "Democrats Woo Iowans Ahead of Caucuses: ‘It’s Like Nothing I’ve Seen’," 3 Feb. 2020 Her hair is short and gray, her eyes very blue and very big. Alexandra Schwartz, The New Yorker, "Vivian Gornick Is Rereading Everyone, Including Herself," 3 Feb. 2020 The most recognizable thing about the Kitty is her eyes: One is blue and one is brown. Kelly O'sullivan, Country Living, "Every 'The Masked Singer' Theory and Spoiler You Need to Know From Season 3," 2 Feb. 2020 Details of the case were revealed Thursday when police filed a search warrant for a pair of shorts and a T-shirt belonging to McMillan, as well as a pair of socks, a pair of briefs and a blue shirt belonging to Witcher. al, "Birmingham man says he killed 3 in Illinois after trying to trade drugs for truck," 31 Jan. 2020 In a sea of camouflage, Chris Jankoski, 34, and his friends stood out with their bright-blue Hawaiian shirts. Jonathan Bullington, The Courier-Journal, "Crowd at Kentucky Capitol gun rally says the Second Amendment is under attack," 31 Jan. 2020 Federer has had some of his most stirring moments on the court that was once green and is now blue, where Laver himself still watches from the front row at age 81. Christopher Clarey, New York Times, "Novak Djokovic Outlasts Roger Federer to Stay Dominant in Australia," 30 Jan. 2020 My bedroom is all blue and white, but the ceiling is painted in the faintest shade of lavender. Luzanne Otte, ELLE Decor, "Patricia Altschul Shares the Best Advice She Got From Mario Buatta," 13 Jan. 2020 Recent Examples on the Web: Noun Could the message behind Harley Quinn and her signature double-dipped blue and red pigtails be lost in the sauce of the film's very long name? Ineye Komonibo, refinery29.com, "The Complicated Reason Margot Robbie’s Birds Of Prey Is Changing Its Iconic Title," 12 Feb. 2020 In fact, blue is especially complementary for brown skin tones. Shalwah Evans, Essence, "These Celebrities And Beauty Lovers Show Us How To Do Classic Blue For Winter," 19 Dec. 2019 Like the Chatterbait, white, green and black/blue are the primary colors, but a few strands of accent colors can be added to match any forage. Pete Robbins, Field & Stream, "3 Bass Lures You Should Never Go Fishing Without," 10 Dec. 2019 The soothing blue is a major departure from last year's choice, a vibrant peach shade called Living Coral. Monique Valeris, ELLE Decor, "Pantone Picks a Calming Blue as Its 2020 Color of the Year," 5 Dec. 2019 Serving as a neutral with grey undertones, French blue is a fresh, classic color that works with every style. Emma Bazilian, House Beautiful, "Is French Blue the New Millennial Pink?," 5 Dec. 2019 The process of editing down the colors of the rainbow wasn’t easy — after all, how does one determine how many blues are necessary and how many are overkill? Michelle Brunner, Washington Post, "Paint companies have a new idea for overwhelmed consumers: Fewer options," 25 Nov. 2019 French blues are not, but blue-veined cheeses from Italy, Spain and the U.K. are. Tribune News Service, cleveland, "Trump’s latest tariffs will affect your holiday cheese, olive oil, wine," 28 Oct. 2019 No doubt the blue will be the Wild’s strength this season. Dane Mizutani, Twin Cities, "Who’s going to make the team? Here’s a breakdown of the Wild roster," 26 Sep. 2019 Recent Examples on the Web: Verb So why won't blue shampoo cut it for keeping cool brunettes cool? Taylore Glynn, Marie Claire, "Brunettes: Green Shampoo Is Here to Save Your Color," 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, "Gold and jewels found on Minoan Island devoted to the color purple," 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, "See the Sweet Photos of Meghan and Harry (and Kate and William!) the Queen Has on Display at Home," 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, "7 Decadent Rooms Inspired By This Weekend's Chicest Celebrity Outfits," 4 June 2019 Stop painting the same models blue and calling it revolutionary. Sandra Salibian | Wwd, latimes.com, "Designer Jeremy Scott responds to social media controversy about Moschino campaign post," 26 June 2018 Stop painting the same models blue and calling it revolutionary. Sandra Salibian | Wwd, latimes.com, "Designer Jeremy Scott responds to social media controversy about Moschino campaign post," 26 June 2018 Stop painting the same models blue and calling it revolutionary. Sandra Salibian | Wwd, latimes.com, "Designer Jeremy Scott responds to social media controversy about Moschino campaign post," 26 June 2018 Stop painting the same models blue and calling it revolutionary. Sandra Salibian | Wwd, latimes.com, "Designer Jeremy Scott responds to social media controversy about Moschino campaign post," 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

Statistics for blue

Last Updated

16 Feb 2020

Cite this Entry

“Blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bluest. Accessed 21 Feb. 2020.

Keep scrolling for more

More Definitions for blue

How to pronounce blue (audio)

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
literary : 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
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?
\ 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

Keep scrolling for more

More from Merriam-Webster on blue

Thesaurus: All synonyms and antonyms for blue

Rhyming Dictionary: Words that rhyme with blue

Spanish Central: Translation of blue

Nglish: Translation of blue for Spanish Speakers

Britannica English: Translation of blue for Arabic Speakers

Comments on blue

What made you want to look up blue? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

More Confusing Words—Quiz

  • cats on impossible timber
  • The magician ______ moved the selected card to the top of the deck.
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

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!