n. Lapis lazuli.n. The fine blue color of the sky: as, “her eyes a bashful azure,”n. A name formerly applied to several sky-colored or blue pigments, but now used for cobalt blue (which see, under blue).n. The sky, or blue vault of heaven.n. In heraldry, the tincture blue, which in uncolored drawings or engravings is represented by shading in horizontal lines. Often abbreviated to az.Resembling the clear blue color of the sky; sky-blue.To color blue.