celestial horizon is a noun meaning "the great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth". It carries one recorded sense.
the great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth
Definitions, synonyms and semantic relations for celestial horizon come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.