- Having a bluish colour shade.
- (informal) Depressed, melancholic, sad.
- (entertainment, informal) Pornographic.
- (US, politics) Supportive of, run by, pertaining to, or dominated by a political party represented by the colour blue. (e.g. The Conservatives, the Democrats)
- (astronomy) Of the higher-frequency region of the part of the electromagnetic spectrum which is relevant in the specific observation.
- (of steak) Extra rare; left very raw and cold.
- (of a dog) Possessing a coat of fur that is a shade of gray
NounBlue (plural Blues)
- The colour of the clear sky or the deep sea, between green and violet in the visible spectrum, and one of the primary additive colours for transmitted light; the colour obtained by subtracting red and green from white light using magenta and cyan filters; or any colour resembling this.
- A blue dye or pigment.
- Blue clothing
- plural A blue uniform. See blues.
- The sky, literally or figuratively.
- The ocean; deep waters.
- Anything blue, especially to distinguish it from similar objects differing only in color.
- (snooker) One of the colour balls used in snooker with a value of 5 points.
- A bluefish.
- (Australian, colloquial) An argument.
- A liquid with an intense blue colour, added to a laundry wash to prevent yellowing of white clothes.
- (UK) a type of firecracker
- (ergative) To make or become blue.
- (transitive) (metallurgy) To treat the surface of steel so that it is passivated chemically and becomes more resistant to rust.
Adjectives for Blue
heavenly; silent; mermaid; exquisite; ca¬nonical; dim; celestial; iceberg; indigo; bright; cadmium; intense; sky; glamorous; turquoise; sapphire; brilliant; ordinary; deep; chalcedony; larkspur; limpid; cobalt; delicate; crystal; anemic; illimitable; somber; opalescent; glossy; boundless; uniform; unbroken; dusty; remotest; wood-smoke; cornflower; purest; periwinkle; light; lu¬minous; royal; aquamarine; aerial; tropic; pallid; sulphurous; frost.
Adverbs for Blue
ineffably; deeply; divinely; heavenly; unspeakably; indescribably; pleasantly; coldly; steely; affectionately; exquisitely; dimly; brightly; intensely; brilliantly; limpidly; delicately; sombrely; boundlessly; dustily; uniformly; remotely; purely; lightly; luminously; royally; frostily.
- (basic colors) color, colour; black, blue, gray, green, orange, purple, red, white, yellow (Category: en:Colors) 
- (blues) blue; Alice blue, aqua, aquamarine, azure, baby blue, beryl, bice, bice blue, blue green, blue violet, blueberry, cadet blue, Cambridge blue, cerulean, cobalt blue, Copenhagen blue, cornflower, cornflower blue, cyan, duck-egg blue, eggshell blue, electric-blue, gentian blue, ice blue, lapis lazuli, lovat, mazarine, midnight blue, navy, Nile blue, Oxford blue, peacock blue, petrol blue, police car blue, powder blue, Prussian blue, robin's-egg blue, royal blue, sapphire, saxe blue, slate blue, sky blue, teal, turquoise, ultramarine, Wedgwood blue, zaffre (Category: en:Blues) 
- primary colour
absolute, air, alcohol, amobarbital sodium, analgesic, aniline blue, anodyne, aquamarine, atrabiliar, atrabilious, azo blue, azulene, azure, azure-blue, azure-colored, azurean, azured, azureness, azureous, azurite blue, baby blue, bad, barb, barbiturate, barbiturate pill, bawdy, benzoazurine, beryl, beryl-blue, berylline, bice, black, black stuff, bleu celeste, blue angel, blue devil, blue heaven, blue sky, blue turquoise, blue velvet, blueness, blueprint, bluish, bluishness, brine, briny, broad, cadaverous, cadet blue, caelum, calamine blue, calmative, canopy, canopy of heaven, cerulean, ceruleous, cerulescent, chloral hydrate, ciba blue, coarse, cobalt, codeine, codeine cough syrup, cold-type proof, color proof, complete, computer proof, cope, cornflower, corpselike, crestfallen, cyan, cyanean, cyanine blue, cyanosis, dark-blue, deadly, deathlike, deathly, deathly pale, deep, deep-blue, dejected, delft blue, depressant, depressed, depressor, despondent, dirty, disconsolate, dismal, dispirited, dolly, down, downcast, downer, downhearted, downright, drink, eerie, empyrean, erotic, ether, filthy, firmament, foul, foul-mouthed, foul-spoken, foul-tongued, foundry proof, fulsome, funky, galley, galley proof, garter blue, ghastly, ghostlike, ghostly, glaucous blue, gloomy, glum, goofball, grisly, gruesome, haggard, hard stuff, heaven, heavens, heroin, hop, horse, hyacinth, hyaline, hypnotic, improper, impure, indecent, indelicate, indigo, indigo white, infernal, isamine blue, ithyphallic, jouvence blue, junk, knockout drops, lapis lazuli blue, laudanum, lavender blue, lewd, lift, lifts, light-blue, lightish-blue, liquor, livid, lividity, lividness, lotus, low, low-spirited, lurid, macabre, madder blue, main, marine blue, melancholic, melancholy, meperidine, methadone, methylene azure, methylene blue, morose, morphia, morphine, mortuary, narcotic, nasty, navy, navy blue, new blue, obscene, off color, off-color, offensive, old blue, opiate, opium, out-and-out, pacifier, page proof, pain killer, pale, paregoric, pavonian, pavonine, peacock blue, peacock-blue, pen yan, pensive, perfect, phenobarbital, phenobarbital sodium, plate proof, pompadour green, pornographic, positive, powder blue, press proof, progressive proof, proof, proof sheet, pull, purple, purple heart, quietener, racy, rainbow, raunchy, red, regular, repro proof, revise, ribald, risque, sad, salacious, salty, sapphire, sapphirine, scag, scurrile, scurrilous, sea, sea blue, secobarbital sodium, sedative, sexy, shady, shit, sky, sky blue, sky-blue, sky-colored, sky-dyed, sleep-inducer, sleeper, sleeping draught, sleeping pill, slip, smack, smalt, smoke blue, smoking-room, smutty, sodium thiopental, somnifacient, soother, soothing syrup, soporific, spicy, starry heaven, steel blue, stone proof, suggestive, sultry, tar, the blue, the blue serene, titillating, tranquilizer, trial impression, tristful, trypan blue, turps, turquoise, ultramarine, uncanny, unchaste, unclean, unearthly, unhappy, unprintable, unrepeatable, vandyke, vault, vault of heaven, vile, vulgar, wan, weird, welkin, white stuff, wicked, wistful, woad, woebegone, yellow, yellow jacket, zaffer
From Middle English blewe, from Old French bleu (“blue”), from Frankish *blāo, from Proto-Germanic *blēwaz (“blue”), probably from Proto-Indo-European *bhlāw-, *bhlēw- (“yellow, grey, blue”). Cognate with Dutch blauw (“blue”), German blau (“blue”); and with Lithuanian blãvas (“blue”). Compare blae.
- enPR: blo͞o, IPA: /bluː/, SAMPA: /blu:/
Audio (US) noicon (file)
Audio (UK) noicon (file)
- Rhymes: -uː
- Homophone: blew