1. (superl.) Having the color of the clear sky, or a hue resembling it, whether lighter or darker; as, the deep, blue sea; as blue as a sapphire; blue violets.

2. (superl.) Pale, without redness or glare, -- said of a flame; hence, of the color of burning brimstone, betokening the presence of ghosts or devils; as, the candle burns blue; the air was blue with oaths.

3. (superl.) Low in spirits; melancholy; as, to feel blue.

4. (superl.) Suited to produce low spirits; gloomy in prospect; as, thongs looked blue.

5. (superl.) Severe or over strict in morals; gloom; as, blue and sour religionists; suiting one who is over strict in morals; inculcating an impracticable, severe, or gloomy mortality; as, blue laws.

6. (superl.) Literary; -- applied to women; -- an abbreviation of bluestocking.

7. (n.) One of the seven colors into which the rays of light divide themselves, when refracted through a glass prism; the color of the clear sky, or a color resembling that, whether lighter or darker; a pigment having such color. Sometimes, poetically, the sky.

8. (n.) A pedantic woman; a bluestocking.

9. (pl.) Low spirits; a fit of despondency; melancholy.

10. (v. t.) To make blue; to dye of a blue color; to make blue by heating, as metals, etc.

Alice blue Amytal Amytal pill Brunswick blue Caelus Capri blue Chinese blue Copenhagen blue Demerol Dolophine Dresden blue Fescennine French blue Gobelin blue H Luminal Luminal pill M Mickey Finn Nembutal Nembutal pill Persian blue Pompeian blue Prussian blue Rabelaisian Saxe blue Seconal Seconal pill Tuinal Tuinal pill Wedgwood blue X 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