noun
- The apparent surface of the imaginary sphere on which celestial bodies appear to be projected.
- synonyms: celestial sphere, sphere, empyrean, heavens, vault of heaven, welkin
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). firmament. Retrieved September 20, 2026, from http://smartdefine.org/firmament/definitions/1327679 |
| Chicago | WordNet. 2010. "firmament" http://smartdefine.org/firmament/definitions/1327679 (accessed September 20, 2026). |
| Harvard | WordNet 2010, firmament, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/firmament/definitions/1327679>. |
| MLA | WordNet. "firmament" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/firmament/definitions/1327679> |