Cite
 

Meaning of superior planet

supe'rior plan'et

Pronunciation: [key]
— Astron. Astron.
  1. any of the six planets whose orbits are outside the orbit of the earth: Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.