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

That same day, Venus will clash with Pluto retrograde, creating tensions both romantically and regarding financial themes in your relationships. —Valerie Mesa, People.com, 6 June 2025

The pre-show is exclusively on Pluto TV, a free streaming television service. —Maureen Lee Lenker, EW.com, 6 June 2025

Oscar-winning filmmaker Sean Baker — who did a Times interview from the Gardena last year and appeared there again just last weekend — has partnered with Pluto TV to support their program. —Mark Olsen, Los Angeles Times, 6 June 2025

The Old Navy x Disney collection includes denim, T-shirts, swimwear and accessories and features Mickey Mouse, Minnie Mouse, Goofy, Pluto and Donald Duck. —David Moin, Footwear News, 5 June 2025

Word History

Etymology

Latin Pluton-, Pluto, from Greek Ploutōn

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for Pluto

• basuto
• prosciutto

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