Definition of PLANET

noun : PLANET

Source: WordNet 3.1

  • 1. (

    ) (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 ;

  • 3. (

    ) any celestial body (other than comets or satellites) that revolves around a star ;

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