Of the color of the clear sky; of the color of the spectrum between wave-lengths .505 and .415 micron, and more especially .487 to .460, or of such light mixed with white; azure; cerulean.Livid; lead-colored: said of the skin or complexion as affected by cold, contusion, or fear (see blae): hence the phrase black and blue. See black.Figuratively, afflicted with low spirits; despondent; depressed; hypochondriacal; having the blues.Dismal; unpromising: applied to things: as, a blue lookout.Inflexible; rigid; strict in morals or religion; puritanic: as, a blue Presbyterian: often in the form true blue (which see, below).[With ref. to blue-stocking, q. v.] Learned; pedantic: applied to women.Indecent; obscene: as, blue stories.In Australia, the volcanic (basaltic) material in places overlying the Tertiary auriferous gravels.The bluish-colored matrix in which the South African diamonds are often found embedded. It is a kind of breccia.n. The color of the clear sky or of natural ultramarine, or a shade or a tint resembling it; azure. See I., 1.n. A dye or pigment of this hue.n. Bluing.n. The sky; the atmosphere.n. The sea; the deep sea.n. A member of a party, or of any company of persons, which has adopted blue as its distinctive color.n. The heavy winter coat of the deer. See phrase in the blue, below.n. A butterfly of the family Lycœnidœ, found in Great Britain and other parts of Europe.n. [Short for bluestocking.] A pedantic woman.n. Soluble blue.n. Any blue that is free from violet, and retains a true blue color in artificial light.n. A somewhat light shade of Prussian blue.n. Prussian blue in a pasty state.n. A Prussian blue to which has been added an excess of prussiate of potash. Also called ball-blue, navy blue.n. [capitalized] The name popularly given to the English regiment properly called the Royal Horse Guards, or Oxford Blues, first mustered in 1661, and so called from their blue uniforms.To make blue; dye a blue color; color with bluing; make blue by heating, as metals, etc.To blush.n. In archery: The third circle of the target, which is now usually colored blue. See target.n. An arrow which hits this circle; a hit in the blue. By the present method of scoring, such a hit counts 5.n. A name sometimes given to water-soluble induline.n. Same as bleu-de-roi (which see).n. A mixture of methylene-blue and methyl-violet.