Bible Dictionaries
Firmament

Webster's Dictionary

(1):

(v. & a.) The region of the air; the sky or heavens.

(2):

(v. & a.) Fixed foundation; established basis.

(3):

(v. & a.) The orb of the fixed stars; the most rmote of the celestial spheres.

Bibliography Information
Webster, Noah. Entry for 'Firmament'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​f/firmament.html. 1828.