Definitions for outer planet
Random House Webster's College Dictionary
any of the five planets with orbits outside the orbit of Mars: Jupiter, Saturn, Uranus, Neptune, and Pluto.
Origin of outer planet:
Any planet of the Solar System whose orbit is located beyond the asteroid belt, i.e., any of Jupiter, Saturn, Uranus, or Neptune.
Find a translation for the outer planet definition in other languages:
Select another language:
Use the citation below to add this definition to your bibliography:
"outer planet." Definitions.net. STANDS4 LLC, 2013. Web. 4 Dec. 2013. <http://www.definitions.net/definition/outer planet>.