Pluto

noun

Plu·​to ˈplü-(ˌ)tō How to pronounce Pluto (audio)
1
: the Greek god of the underworld compare dis
2
[New Latin] : a dwarf planet occupying an orbit that crosses the orbit of Neptune
Is Pluto a planet?: Usage Guide

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.

Examples of Pluto in a Sentence

Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Read More: The Mysterious World of Uranus, the Ice Giant Renewed Interest in Planet X The search for Planet X eventually led to the discovery of Pluto in 1930. Emilie Le Beau Lucchesi, Discover Magazine, 6 Nov. 2024 The 2005 revelation set off a chain of events that led to Pluto’s still-controversial demotion from planet status the following year. Jacopo Prisco, CNN, 5 Nov. 2024 Scorpio is a Water sign governed by Pluto, the planet of transformation and rebirth. Valerie Mesa, People.com, 4 Nov. 2024 As Pluto reenters your sign on November 19, a transformative energy returns and may push you to evolve in profound ways. Meghan Rose, Glamour, 1 Nov. 2024 See all Example Sentences for Pluto 

Word History

Etymology

Latin Pluton-, Pluto, from Greek Ploutōn

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of Pluto was in the 14th century

Dictionary Entries Near Pluto

Cite this Entry

“Pluto.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Pluto. Accessed 14 Nov. 2024.

Kids Definition

Pluto

noun
Plu·​to ˈplüt-ō How to pronounce Pluto (audio)
: a large object in the outermost part of the solar system that is often considered one of the planets see note at planet

More from Merriam-Webster on Pluto

Last Updated: - Updated example sentences
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