Definitions
There is 1 meaning of the phrase
Outer Planet.
Outer Planet - as a noun
(astronomy) a major planet whose orbit is outside the asteroid belt (jupiter, saturn, uranus, neptune, pluto)
Example Sentences
"Jupiter is the largest outer planet in our solar system."
"Neptune is the farthest outer planet from the Sun."
"Scientists study the atmospheres of outer planets to learn more about them."
"Saturn is known for its beautiful rings, making it a unique outer planet."
"Uranus is tilted on its side compared to the other outer planets."