eighthplanet
nounUK /eɪtθ ˈplænɪt/
US /eɪtθ ˈplænɪt/
The eighth planet is the planet that comes after seven others in order from the sun.
Neptune is known as the eighth planet in our solar system.
RELATED WORDS
OTHER MEANINGS
2. A planet that is eighth in any ordered list or ranking.
In the story, the explorers named the eighth planet they found 'Eighthplanet'.
3. A nickname for a distant, cold world far from its star.
The icy eighthplanet was too cold for humans to visit.
4. A made-up name for a fictional planet in games or stories.
The kids drew a map of Eighthplanet with rings and moons.