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
The zodiac sign is linked to Mars (the planet of war) and Pluto (the planet of intensity).
—
Skyler Caruso, People.com, 26 May 2025
May 24 Initial location: Southwest of County Highway A12 and Shasta Vista Drive, Mount Shasta Vista Subdivision, Calif.
Fire unit: Cal Fire Siskiyou Unit
Fire type: Wildfire
Fire name: Pluto Fire
Pluto Fire initially started 2:20 p.m. May 24 in Siskiyou County.
—Ca Wildfire Bot, Sacbee.com, 26 May 2025
But why do Pluto and its fellow dwarf planets not enjoy the same status as the solar system’s eight regular planets?
—Jack Knudson, Discover Magazine, 23 May 2025
Communication planet Mercury in Gemini, responsible Saturn in Aries, visionary Neptune in Aries, and transformative Pluto in Aquarius all meet up with the New Moon.
—Lisa Stardust, Refinery29, 23 May 2025
See All Example Sentences for Pluto
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Skyler Caruso, People.com, 26 May 2025
May 24 Initial location: Southwest of County Highway A12 and Shasta Vista Drive, Mount Shasta Vista Subdivision, Calif.
Fire unit: Cal Fire Siskiyou Unit
Fire type: Wildfire
Fire name: Pluto Fire
Pluto Fire initially started 2:20 p.m. May 24 in Siskiyou County.
—Ca Wildfire Bot, Sacbee.com, 26 May 2025
But why do Pluto and its fellow dwarf planets not enjoy the same status as the solar system’s eight regular planets?
—Jack Knudson, Discover Magazine, 23 May 2025
Communication planet Mercury in Gemini, responsible Saturn in Aries, visionary Neptune in Aries, and transformative Pluto in Aquarius all meet up with the New Moon.
—Lisa Stardust, Refinery29, 23 May 2025
See All Example Sentences for Pluto
Cite this Entry
“Pluto.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Pluto. Accessed 2 Jun. 2025.
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