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

With Holland coming on board, Tom Ryan, CEO of Paramount Streaming who has overseeing Paramount+ and Pluto TV, is leaving the company. —Todd Spangler, Variety, 6 Aug. 2025

The month comes to an end with Venus opposite Pluto, putting your identity under pressure while forcing you to confront power dynamics in your one-on-one relationships. —Valerie Mesa, People.com, 5 Aug. 2025

Control issues masquerade behind romantic promises as Venus and Pluto clash. —Usa Today, USA Today, 2 Aug. 2025

Whither Pluto? One of the biggest TV-industry crimes of the current decade has been how the last couple of regimes at Paramount have bungled their ownership of free streamer Pluto TV. —Chris Lee, Vulture, 31 July 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