What is firmament meaning?

The firmament is a term used in ancient and biblical cosmology to refer to the sky or heavens. It was believed to be a solid dome-like structure that separated the waters above from the waters below. In religious texts, the firmament is often described as a creation of God and serves as a symbol of his power and authority over the earth. The concept of the firmament has been largely discredited by modern science, which recognizes that the Earth is an orb floating in space, and that the atmosphere blends gradually into the vacuum of space.