Sky (skī), n.; pl.Skies (skīz). [OE. skie a cloud, Icel. skȳ; akin to Sw. & Dan. sky; cf. AS. scūa, scūwa, shadow, Icel. skuggi; probably from the same root as E. scum. √158. See Scum, and cf. Hide skin, Obscure.] 1. A cloud.
that blew so hideously and high,
That it ne lefte not a sky
In all the welkin long and broad. Chaucer.
2. Hence, a shadow.
She passeth as it were a sky. Gower.
3. The apparent arch, or vault, of heaven, which in a clear day is of a blue color; the heavens; the firmament; — sometimes in the plural.
The Norweyan banners flout the sky. Shak.
4. The wheather; the climate.
Thou wert better in thy grave than to answer with thy uncovered body this extremity of the skies. Shak.
☞ Sky is often used adjectively or in the formation of self-explaining compounds; as, sky color, skylight, sky-aspiring, sky-born, sky-pointing, sky-roofed, etc.
Sky blue, an azure color. — Sky scraper(Naut.), a skysail of a triangular form. Totten. — Under open sky, out of doors. “Under open sky adored.” Milton.