planet
plan.et \'plan-*t\ n [ME planete, fr. OF, fr. LL planeta, modif. of Gk plane-t-], plane-s, lit., wanderer, fr. planasthai to wander; akin to ON flana to rush around 1a: any of the seven heavenly bodies sun, moon, Venus, Jupiter, Mars, Mercu ry, and Saturn that in ancient belief have motions of their own among the fixed stars 1b: one of the bodies except a comet, meteor, or satellite that revolves ar ound the sun in the solar system; specif : EARTH 2: a heavenly body held to influence the fate of human beings 3: a person or thing of great importance : LUMINARY
Webster's English Dictionary