Definition of firmament in English:

firmament

noun

literary
  • The heavens or sky:

    ‘thunder shakes the firmament’
    figurative ‘one of the great stars in the American golfing firmament’
    • ‘In the sky, the Pole Star, around which the firmament appears to turn, has been styled the ‘navel of the Heavens'.’
    • ‘Little space was devoted to the fact that a sporting success-starved nation suddenly had a youthful role model, an ambassador who could put India's name on the tennis firmament.’
    • ‘They're coveted by a generation too young to remember the designer's heyday, when she was one of the brightest stars in the fashion firmament, turning out exuberant, fantastical creations.’
    • ‘Sometimes the lightening forked across the sky like a crack in the dark firmament.’
    • ‘We await with interest word of their further plans for this rising star of an upcoming mid-tier production company in the gold mining firmament.’
    the sky, heaven, the blue, the wide blue yonder, the azure, the heavens, the skies
    the celestial sphere, the empyrean, the welkin
    View synonyms

Origin

Middle English: via Old French from Latin firmamentum, from firmare fix, settle.

Pronunciation

firmament

/ˈfəːməm(ə)nt/