undersky

The lower region of the sky.

Noun

  1. The lower region of the sky.
    • [A]t first to the ear / The warble was low, and full and clear; / And floating about the under-sky, […] - 1842, Alfred Tennyson, “The Dying Swan”, in Poems. […], volume I, London: Edward Moxon, […], →OCLC, page 54:

Origin

From under- + sky.

Forms

underskies