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

Related article Astronomers have for decades tried to figure out how Pluto captured its largest moon. —Ashley Strickland, CNN, 13 Jan. 2025

However, the energy continues to shift as Mercury enters Aquarius on the 27th, joining powerhouse Pluto in your relationship sector. —Valerie Mesa, People.com, 10 Jan. 2025

Space: Pluto may have captured its biggest moon after an ancient dance and kiss. —The Staff Of The Morning, New York Times, 9 Jan. 2025

Read more Yellowstone Scientists Reveal Hidden Secret That Helped Make the Great Lakes Space: How Pluto Landed its Moon With a 'Kiss' Warning Signs of an Eruption at Yellowstone In the event of a volcanic eruption, scientists would be able to detect key warning signs well in advance. —Tommy Tuberville, Newsweek, 8 Jan. 2025

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