noun

1. A blue colour on a coat of arms, represented in engraving by horizontal parallel lines.

2. The clear blue colour of the sky; also, a pigment or dye of this colour.

3. The unclouded sky; the blue vault above.

verb

1. To colour blue.

adjective

1. Sky blue; resembling the clear blue colour of the unclouded sky

2. Cloudless

3. In blazon, of the colour blue.

Synonyms: cerulean