Pluto

noun

Plu·​to ˈplü-(ˌ)tō How to pronounce Pluto (audio)
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 The Pluto Pillow is available in standard size (24x16 inches) and king size (34x16 inches). Sarah Garone, Parents, 28 Apr. 2024 The Euphoria star’s Saturn is in alignment with Holland’s moon and Pluto in Sagittarius. Valerie Mesa, Peoplemag, 26 Apr. 2024 Meanwhile, Voyager 1 used Saturn as a gravitational slingshot to power itself past Pluto. Greg Wehner, Fox News, 25 Apr. 2024 The series, co-created by Matt Stone and Trey Parker, has proven to be a key driver for Pluto TV across international markets. Patrick Frater, Variety, 23 Apr. 2024 The spacecraft observed Saturn’s rings in detail and discovered active volcanoes on Jupiter’s moon Io. Originally designed for a five-year mission within our solar system, both probes are still operational and chugging along through space, far beyond Pluto’s orbit. Will Sullivan, Smithsonian Magazine, 23 Apr. 2024 Stone and Parker also have a deal separate from Pluto TV for original South Park TV movies to stream exclusively on Paramount+. Etan Vlessing, The Hollywood Reporter, 23 Apr. 2024 Social intensity can rear up when the sun aggravates Pluto. USA TODAY, 21 Apr. 2024 Other apps announced with Vision Pro support include ESPN, MLB, PGA Tour, Max, Discovery Plus, Amazon Prime Video, Paramount Plus, Peacock, Pluto TV, Tubi, Fubo, Crunchyroll, Red Bull TV, IMAX, TikTok, and MUBI. The Verge, 18 Apr. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'Pluto.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Latin Pluton-, Pluto, from Greek Ploutōn

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of Pluto was in the 14th century

Dictionary Entries Near Pluto

Cite this Entry

“Pluto.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Pluto. Accessed 2 May. 2024.

Kids Definition

Pluto

noun
Plu·​to ˈplüt-ō How to pronounce Pluto (audio)
: a large object in the outermost part of the solar system that is often considered one of the planets see note at planet

More from Merriam-Webster on Pluto

Last Updated: - Updated example sentences
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