Try Our Apps


Avoid these words. Seriously.

outer planet

noun, Astronomy.
any of the four planets with orbits outside the orbit of Mars, namely, the planets Jupiter, Saturn, Uranus, and Neptune.
Compare inner planet.
Origin of outer planet
First recorded in 1940-45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for outer planet
Historical Examples
  • The explanation of the movement of an outer planet like Mars could also be deduced from the joint effect of two perfect motions.

    Great Astronomers R. S. Ball
  • Let us assume that this outer planet has started on its course, in a prescribed path, and that it has a certain mass.

    Great Astronomers R. S. Ball
  • Le Verrier's prediction of an outer planet was a matter of dead certainty.

    Mars and its Mystery Edward Sylvester Morse
  • For consider the facts which characterise the movements of an outer planet such as Mars.

    Great Astronomers R. S. Ball
  • We'd better make the limits of your sovereignty the orbit of the outer planet of this system.

    A Slave is a Slave Henry Beam Piper
British Dictionary definitions for outer planet

outer planet

any of the planets Jupiter, Saturn, Uranus, Neptune, and (formerly) Pluto, whose orbit lies outside the asteroid belt
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
outer planet in Science
outer planet  
Any of the five planets Jupiter, Saturn, Uranus, Neptune, and Pluto, whose orbits lie outside that of Mars. With the exception of Pluto, the outer planets are large gas giants. Compare inner planet. See also superior planet.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for outer planet

Word Value for outer

Scrabble Words With Friends