welkin

noun3

1. •
   (literary) The sky which appears to an observer on the Earth as a dome in which celestial bodies are visible; the firmament.

   • He leaues the vvelkin vvay most beaten playne, / And rapt with vvhirling vvheeles, inflames the skyen, / With fire not made to burne, but fayrely for to shyne. — 1590
2. •
   (literary) The upper atmosphere occupied by clouds, flying birds, etc.

   • [W]ho you are, and vvhat you vvould are out of my vvelkin, I might say Element, but the word is ouer-vvorne. — 1601
3. •
   (literary) The place above the Earth where God or other deities live; heaven.

   • [T]his villanous Poetry vvill vndoe you, by the VVelkin. — 1601