[plan.et] n [ME planete, fr. OF, fr. LL planeta, modif. of Gk planet-, planes, lit., wanderer, fr. planasthai to wander--more at floor] (13c) 1 a: any of the seven celestial bodies sun, moon, Venus, Jupiter, Mars, Mercury, and Saturn that in ancient belief have motions of their own among the fixed stars b (1): any of the large bodies that revolve around the sun in the solar system (2): a similar body associated with another star c: earth--usu. used with the
2: a celestial body held to influence the fate of human beings
3: a person or thing of great importance: luminary -- plan.et.like adj