the pure color of a clear sky; the primary color between green and violet in the visible spectrum, an effect of light with a wavelength between 450 and 500 nm.

bluing.

something having a blue color

Place the blue next to the red.

a person who wears blue or is a member of a group characterized by some blue symbol

Tomorrow the blues will play the browns.

( often initial capital letter ) a member of the Union army in the American Civil War or the army itself. Compare gray ( def. 13 ) .

bluestocking.

blue ribbon ( def. 1 ) .

any of several blue-winged butterflies of the family Lycaenidae.

Printing . blueline.

the blue,

the sky.

the sea.

the remote distance

They've vanished into the blue somewhere.

of the color of blue

a blue tie.

( initial capital letter ) of or pertaining to the Union army in the American Civil War.

(of the skin) discolored by cold, contusion, fear, or vascular collapse.

depressed in spirits; dejected; melancholy

She felt blue about not being chosen for the team.

holding or offering little hope; dismal; bleak

a blue outlook.

characterized by or stemming from rigid morals or religion

statutes that were blue and unrealistic.

marked by blasphemy

The air was blue with oaths.

(of an animal's pelage) grayish-blue.

indecent; somewhat obscene; risqué

a blue joke or film.

to make blue; dye a blue color.

to tinge with bluing

Don't blue your clothes till the second rinse.

to become or turn blue. ?

blue in the face, exhausted and speechless, as from excessive anger, physical strain

etc.

I reminded him about it till I was blue in the face.

out of the blue

suddenly and unexpectedly

The inheritance came out of the blue as a stroke of good fortune.

adjective

gay , happy , joyful , joyous , lighthearted , upbeat , clean , decent , unvulgar

adjective

azure , beryl , cerulean , cobalt , indigo , navy , royal , sapphire , teal , turquoise , ultramarine , dejected , depressed , despondent , disconsolate , dismal , dispirited , downcast , downhearted , down in the dumps , fed up * , gloomy , glum , low , melancholy , moody , unhappy , woebegone , bawdy , dirty , indecent , lewd , naughty , obscene , off-color , racy , risqu , salty , shady , smutty , spicy , suggestive , wicked , desolate , down , dull , dysphoric , heavy-hearted , melancholic , sad , spiritless , tristful , wistful , black , bleak , cheerless , dark , dreary , joyless , somber , tenebrific , depressing , dispiriting , earthy , provocative , scabrous , (colloq.) gloomy , (colloq.) melancholy , (colloq.)pedantic , amethystine , aqua , bluish , cerulific , chapfallen , cyanotic , ecchymosed , hypochondriac , inauspicious , literary , livid , low-spirited , perse , puritanical , rigorous , sapphirine , severe , sky-colored , unpromising , violet