Pluto

noun

Plu·​to ˈplü-(ˌ)tō 

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

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

Word History

Etymology

Latin Pluton-, Pluto, from Greek Ploutōn

First Known Use

14th century, in the meaning defined at sense 1

Kids Definition

Pluto

noun

Plu·​to ˈplüt-ō 

: a large object in the outermost part of the solar system that is often considered one of the planets see note at planet