noun

firmament

FUR-muh-munt/ˈfɜːrməmənt/

The sky imagined as an overarching realm.

Bright stars fill the firmament above the quiet mountain town.

A grand expanse of starry night sky arches over a low distant hill silhouette, sky/heavens dominant, restrained dark-blue watercolor with crisp small stars and white paper margins.
Etymology

The 'strong, steadfast' base produced a noun meaning 'a support' or 'a strengthening.' Its heavenly sense reflects a biblical translation that represented the sky as a firm or solid structure.

In context

David Jeremiah9:49
let birds fly above the earth across the face of the firmament of the heavens
What is Heaven like?

More examples

  • A pale moon hangs in the firmament.
  • At dawn, the firmament turns from black to gold.
  • Her latest novel earns her a place in the literary firmament.

Forms

firmament · firmaments

Similar words

sky
The everyday term, without the suggestion of an overarching realm.
heavens
Likewise elevated in tone, but may also suggest a divine realm.