Meanings
Synonyms & antonyms
nounAny planet that is significantly larger and more massive than Earth, containing large amounts of hydrogen and helium, such as Jupiter and Neptune.
antonym(s) of “larger than Earth”
antonym(s) of “2006 IAU definition of planet”
More synonyms by meaning
noun(astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order of their proximity to the sun; viewed from the constellation Hercules, all the planets rotate around the sun in a counterclockwise direction
Synonym sets from Open English WordNet, CC BY 4.0.
Cite this entry
major planet. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/major%20planet
“major planet.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/major%20planet. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “major planet,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/major%20planet.
Source: major planet on Wiktionary, CC BY-SA 4.0.