blue

adjective
\ˈblü \
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 politics : tending to support Democrats in a general election blue states

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

Former Republican senator Rick Santorum, a Hardiman ally, pitched his blue-collar biography to friends at the White House. Author: Ashley Parker, Robert Costa, Anchorage Daily News, "‘All a little misdirection’: Inside Trump’s sometimes-wavering decision to nominate Kavanaugh," 11 July 2018 Is there economic opportunity for blue-collar workers in renewables? Noelle Swan, The Christian Science Monitor, "The Monitor’s collaboration with the Energy Foundation," 29 June 2018 Each week, residents bring trash and recycling to the curb in green and blue bins. Mikaela Porter, Courant Community, "West Hartford Residents React: A Lot Of Trash Talk About New Garbage Proposal," 19 June 2018 The blue and white Air Force One owes its iconic look to President John F. Kennedy and his wife Jackie. Kris Van Cleave, CBS News, "What would a new Air Force One look like under Trump?," 12 July 2018 One man wore a white T-shirt with black pants and a black hat, while the other wore a blue and yellow plaid, short sleeve, buttoned shirt and light-colored pants with a white baseball cap, the video showed. Wayne K. Roustan, Sun-Sentinel.com, "Thieves steal diamond rings worth $45,000, police say," 11 July 2018 Middleton is notorious for her picture-perfect royal style, and Markle stepped up to the plate in cream high-waisted suit pants, a tucked in white and blue striped button-up from Ralph Lauren, and the cherry on top — the panama hat. Anna Millard, refinery29.com, "Yes, You've Seen Meghan Markle's Wimbledon Hat Before," 14 July 2018 Meg Jones, Milwaukee Journal Sentinel More than 60 Eder Flag Manufacturing Co. workers lined up on both sides of a really long table this week, their hands tenderly holding red, white and blue fabric. Meg Jones, Milwaukee Journal Sentinel, "Oak Creek-based Eder Flag repairs treasured American flag damaged in Afghanistan," 13 July 2018 The Shanghai, where her mother’s family hails from, features a jade-like bit of marbled agate and a white and blue porcelain bead akin to a Ming vase. Monica Kim, Vogue, "SVNR’s Colorful Keepsake Earrings Turn Forgotten Objects Into Chic Mementos," 13 July 2018

Recent Examples on the Web: Noun

Giant water bodies turning aquamarine blue is a sign that the base of the food chain is being depleted, risking starvation for other species, including sport fish. Seattle Times Staff, The Seattle Times, "Washington state plans to use dog to detect invasive mussels on boats," 23 June 2018 District 28 is perhaps the state's most competitive, and Democrats view it as key in their quest to turn the chamber blue. Dustin Gardiner, azcentral, "Arizona Legislature: 4 sizzling races that could decide the balance of power," 5 June 2018 Many analysts say if the GOP primary goes to a runoff, the campaign is likely to be both expensive and nasty, but Democrats are unlikely to turn this red state blue for at least a few more years. Jonathan Serrie, Fox News, "Republicans in Georgia’s governor race take hard-line stance on gun rights, illegal immigration," 23 May 2018 Abrams, 44, is an attorney, the former minority leader in Georgia’s House of Representatives, and has long been working hard to turn the southern state blue. Gabriella Paiella, The Cut, "5 Reasons to Get Excited About Stacey Abrams," 23 May 2018 Suspicious incident, Crocker Park: A caller to Westlake police at 4:30 p.m. April 28 said a man was passed out in the mulch in front of a Crocker Park store, and his skin was turning blue. Bruce Geiselman, cleveland.com, "Thieves break into Westlake business: police blotter," 12 May 2018 Images on Twitter show the thousands of creatures turned the surf blue and tumbled ashore in waves, as tourists looked on in horror. Mark Price, charlotteobserver, "One of the world's top beaches is a 'blue carpet of slime' after creatures wash ashore," 2 May 2018 Will Democrats find a candidate who can galvanize moderate Republicans and Trump opponents and try to turn the district blue for the first time since the early 1980s? Chrissie Thompson, Cincinnati.com, "Who's who in the crowded special election for Ohio's 12th District in Congress," 28 Apr. 2018 Democrats have long dreamed about turning Texas blue, a goal that seems perennially just out of reach. Benjamin Hart, Daily Intelligencer, "Beto O’Rourke Announces Eye-popping Fundraising Numbers," 3 Apr. 2018

Recent Examples on the Web: Verb

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 Stop painting the same models blue and calling it revolutionary. refinery29.com, "Gigi Hadid Is An 'Illegal Alien' In New Fashion Ad – & People Are Not Happy," 27 June 2018 The lights on the Empire State Building, which had been red, white, and blue for Election Day, slowly shifted until only blue remained. Lauren Le Vine, Redbook, "Who Won the 2012 Election? Women," 6 Nov. 2012 Because green and blue make up a large part of the visible rainbow, removing these colors leaves us with a pretty bland looking version. Megan Arnett, Scientific American, "Make Your Own Rainbow," 26 Apr. 2018 How can seemingly blue ocean water run clear in her hands? Susan Faust, San Francisco Chronicle, "Roundup of new children’s books, March 25," 22 Mar. 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

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

Noun

see blue entry 1

Verb

see blue entry 1

Keep scrolling for more

Learn More about blue

Dictionary Entries near blue

blude

bludge

bludgeon

blue

blue acara

blue agave

blue alert

Statistics for blue

Last Updated

9 Nov 2018

Look-up Popularity

Time Traveler for blue

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

See more words from the same century

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 blue : the sky or the sea

blue

noun
\ˈblü \

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 \
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

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

noxious or harmful

Get Word of the Day daily email!

Test Your Vocabulary

A Thanksgiving Word Quiz

  • a-traditional-thanksgiving-dinner
  • November comes from a word for which of the following numbers?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

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!