Webster's Revised Unabridged Dictionary · 1913

Azure

Azure (?; 277) , adjective

[French & OSp. azur, Sp. azul, through Arabic from Per. lājaward, or lājuward, lapis lazuli, a blue color, lājawardī, lājuwardī, azure, cerulean, the initial l having been dropped, perhaps by the influence of the Arabic azr-aq azure, blue. Compare German lasur, lasurstein, azure color, azure stone, and New Latin lapis lazuli.]

Sky-blue; resembling the clear blue color of the unclouded sky; cerulean; also, cloudless.
Collocations (1)
Azure stone (Mineralogy) , the lapis lazuli; also, the lazulite.

Azure , noun

1.
The lapis lazuli. [Obsolete]
2.
The clear blue color of the sky; also, a pigment or dye of this color.
In robes of azure. — Wordsworth
3.
The blue vault above; the unclouded sky.
Not like those steps On heaven's azure. — Milton
4.
(Heraldry) A blue color, represented in engraving by horizontal parallel lines.

Azure , transitive verb

To color blue.