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- Dictionarydwarf planet
noun
- 1. a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
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- dwarf planet
Object in direct orbit of the Sun, but which has not cleared the orbital region of neighbouring objects
A dwarf planet is a small planetary-mass object that is in direct orbit around the Sun, massive enough to be gravitationally rounded, but insufficient to achieve orbital dominance like the eight classical planets of the Solar System. The prototypical dwarf planet is Pluto, which for decades was regarded as a planet before the "dwarf" concept was adopted in 2006. Wikipedia
