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

In the morning rush to make it out the door, Mickey and Pluto are left behind and home alone. — Matt Minton, Variety, 16 June 2026

It’s been nearly two years since the last Future solo album, 2024’s Mixtape Pluto. — Alex Suskind, Pitchfork, 15 June 2026

All episodes of Hart of Dixie are available to stream on Pluto TV. — Lexi Lane, PEOPLE, 13 June 2026

Under his watch, Pluto TV hit $1 billion in annual revenue by 2021. — Michael Schneider, Variety, 10 June 2026

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