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Definition of Outer planet
1. Noun. (astronomy) a major planet whose orbit is outside the asteroid belt (Jupiter, Saturn, Uranus, Neptune, Pluto).
Category relationships: Astronomy, Uranology
Specialized synonyms: Jupiter, Neptune, Pluto, Saturn, Uranus
Generic synonyms: Major Planet, Planet
Group relationships: Solar System
Specialized synonyms: Jupiter, Neptune, Pluto, Saturn, Uranus
Generic synonyms: Major Planet, Planet
Group relationships: Solar System
Definition of Outer planet
1. Noun. (astronomy) Any planet of the Solar System whose orbit is located beyond the asteroid belt, i.e., any of Jupiter, Saturn, Uranus, or Neptune. ¹
¹ Source: wiktionary.com