An arched overhead covering, such as the sky, that resembles the architectural structure in form.
The highest reaches of heaven, believed by the ancients to be a realm of pure fire or light.
(Physics) A hypothetical diffuse, invisible medium formerly thought to pervade space and transmit light, heat, etc.
The gaseous mass surrounding any star, planet, etc.
Public utterance; vent:
The vault of heaven; the sky.
An imaginary sphere with Earth at its center. The stars, planets, Sun, Moon, and other celestial bodies appear to be located on this sphere, and the sphere appears to rotate around the Earth's extended axis once every 24 hours, carrying the celestial bodies with it overhead and giving them their diurnal motions. The celestial sphere is essentially a spherical map of the sky that provides the basis for the coordinate systems used in celestial navigation and in specifying the positions and motions of celestial objects.
The atmosphere, as seen from a given point on the Earth's surface. The sky appears to be blue because the wavelengths associated with blue light are scattered more easily than those that are associated with the other colors.
A celestial body, such as a planet or star.
The totality of all the things that exist; creation; the cosmos
Find another word for firmament. In this page you can discover 18 synonyms, antonyms, idiomatic expressions, and related words for firmament, like: vault of heaven, vault, heavens, heaven, empyrean, ether, atmosphere, air, welkin, celestial-sphere and sky.