noun
definition
(usually uncountable) The vault of the heavens, where the clouds, sun, moon, and stars can be seen; the heavens, the sky.
synonyms
definition
The field or sphere of an activity or interest.
example
the international fashion firmament
definition
In the geocentric Ptolemaic system, the eighth celestial sphere which carried the fixed stars; (by extension) any celestial sphere.
definition
(obsolete except biblical) The abode of God and the angels; heaven.
definition
A piece of jewellery worn in a headdress with numerous gems resembling stars in the sky.
definition
A basis or foundation; a thing which lends strength or support.
definition
The act or process of making firm or strengthening.