Definitions
1.nounA blue colour on a coat of arms, represented in engraving by horizontal parallel lines.
2.nounThe clear blue colour of the sky; also, a pigment or dye of this colour.
3.nounThe unclouded sky; the blue vault above.
4.nounAny of various widely distributed lycaenid butterflies of the genus Celastrina.
5.nounAny of various Australasian lycaenid butterflies of the genus Ogyris.
6.nounLapis lazuli.
7.verbTo colour blue.
8.adjectiveSky blue; resembling the clear blue colour of the unclouded sky
9.adjectiveCloudless
10.adjectiveIn blazon, of the colour blue.