Noun: major planet
- (astronomy) any of the large celestial bodies in the solar system that revolve around the sun; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune (and sometimes also Pluto) in order of their proximity to the sun
"Venus is the second major planet from the Sun";
- planet
Derived forms: major planets
Type of: celestial body, heavenly body
Part of: solar system
Encyclopedia: Major planet