welkin

wel·kin  (wlkn)

n. Archaic

1. The vault of heaven; the sky.

2. The upper air.

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[Middle English welken, from Old English wolcen, weolcen, cloud.]

Thesaurus

Noun

1.

welkin - the apparent surface of the imaginary sphere on which celestial bodies appear to be projected celestial sphere, empyrean, firmament, heavens, vault of heaven, sphere apex of the sun's way, solar apex, apex - the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars celestial point - a point in the heavens (on the celestial sphere) nadir - the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected surface - the extended two-dimensional outer boundary of a three-dimensional object; "they skimmed over the surface of the water"; "a brush small enough to clean every dental surface"; "the sun has no distinct surface" zenith - the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected zodiac - a belt-shaped region in the heavens on either side to the ecliptic; divided into 12 constellations or signs for astrological purposes