1. any of the four outermost planets in the solar system; much larger than Earth and gaseous in nature (like Jupiter); [syn: Jovian planet, gas giant]
WordNet (r) 3.0 (2006):
Jovian planet
n 1: any of the four outermost planets in the solar system; much
larger than Earth and gaseous in nature (like Jupiter)
[syn: Jovian planet, gas giant]