Sky, n.
Sky (72), n. [Icel. sky, Sw. sky, Dan. sky, skye, a cloud, skyhimmel, the vault of heaven, the sky, O. Sax. scio, sceo, the region of clouds. Cf. A-S. scâda, scâva, shadow.]
Sense 1. The apparent arch or vault of heaven, which in a clear day is of a blue color; the heavens.
The Norwegian banners float the sky. Shak.
Sense 2. The weather; the climate.
Sense 3. A cloud; a shadow. [Obs.] Gower.
Sky is often used in the formation of self-explaining compounds: as, sky-aspiring, sky-attempting, sky-born, sky-built, sky-colored, sky-dyed, sky-encountering, sky-guided, sky-mixed, sky-pointing, sky-returning, sky-robe, sky-roofed, sky-ruling, sky-tinctured, and the like.
Open sky, sky with no intervening shelter. “Under open sky adored.” Milton.