Definition of Pluto
1 : the Greek god of the underworld — compare dis
2 [New Latin] : a dwarf planet occupying an orbit that crosses the orbit of Neptune
Explore M-W
Is pluto a planet?
In 2006 the International Astronomical Union defined planet in such a way as to exclude Pluto, reclassifying it instead as a dwarf planet. Although discussion of the matter continues, the change has been widely accepted.
Origin and Etymology of pluto
Latin Pluton-, Pluto, from Greek Ploutōn
PLUTO Defined for English Language Learners
Pluto
playDefinition of Pluto for English Language Learners
-
: the object in our solar system that in the past was thought to be the planet farthest from the sun but that is no longer considered to be a planet
Learn More about pluto
-
See words that rhyme with Pluto Spanish Central: Translation of Pluto Nglish: Translation of Pluto for Spanish speakers Britannica English: Translation of Pluto for Arabic speakers Britannica.com: Encyclopedia article about Pluto
Seen and Heard
What made you want to look up Pluto? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!