Synonyms for vault of heaven

Synonyms for (noun) vault of heaven

Synonyms: vault of heaven, welkin, empyrean, firmament, sphere, celestial sphere, heavens

Definition: the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

Similar words: surface

Definition: the extended two-dimensional outer boundary of a three-dimensional object

Usage: they skimmed over the surface of the water; a brush small enough to clean every dental surface; the sun has no distinct surface