planet

noun
plan·​et | \ ˈpla-nət How to pronounce planet (audio) \

Definition of planet

1a(1) : any of the large bodies that revolve around the sun in the solar system
(2) : a similar body associated with another star
b : earth usually used with the one of the hottest places on the planet
c : any of the seven celestial bodies sun, moon, Venus, Jupiter, Mars, Mercury, and Saturn that in ancient belief have motions of their own among the fixed stars
2 : a celestial body held to influence the fate of human beings
3 : a person or thing of great importance : luminary
planet table

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Other Words from planet

planetlike \ ˈpla-​nət-​ˌlīk How to pronounce planetlike (audio) \ adjective

Synonyms for planet

Synonyms

earth, globe, world

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Did You Know?

Planet goes back to ancient Greek planēt- (literally, "wanderer"), which is derived from "planasthai," a Greek verb which means "to wander." The name "planet" was originally applied to any of seven visible celestial bodies which appeared to move independently of the fixed stars - the sun, the moon, Mercury, Venus, Mars, Jupiter, and Saturn. In the 17th century, "planet" began to be used specifically of the rocky or gaseous bodies that orbit around the sun - a definition which excluded the moon and, obviously, the sun, but included the Earth and, as they were discovered, Uranus, Neptune, and Pluto. In 2006, the International Astronomical Union developed a narrower definition of "planet," effectively demoting Pluto to the status of a "dwarf planet," a celestial body that is spherical and orbits the sun but is not large enough to disturb other objects from its orbit.

Examples of planet in a Sentence

our collective responsibility to conserve the planet and its natural resources for future generations

Recent Examples on the Web

The story follows the adventures of Billy Pilgrim, an American soldier who survives the bombing of Dresden in 1945, only to be abducted by aliens from the planet Tralfamadore and exhibited in their zoo. Amanda Foreman, WSJ, "Fantasies of Alien Life," 7 Mar. 2019 Satellites placed in low-Earth orbit usually stopped distancing themselves from the planet after traveling 1,000 miles or less. Alex Hollings, Popular Mechanics, "The Saturn V Story: From Nazi Roots to America's Moon Rocket," 6 Feb. 2019 That’s been true since 1980, when a major global vaccine effort wiped the virus from the planet. Julia Belluz, Vox, "7 bad science and health ideas that should die with 2018," 26 Dec. 2018 Superman, a fictional comic book alien from the planet Krypton, looks human but defies all boundaries of humanity. Jenn M. Jackson, Teen Vogue, "Kanye West Is What Internalized Racism and Misogyny Looks Like," 17 Oct. 2018 At about the same time, its identical robotic twin, called Spirit, landed on the opposite side of the planet. Robert Lee Hotz, WSJ, "NASA Calls It Quits for Opportunity Mars Rover After 15-Year Mission," 13 Feb. 2019 The Korolev crater formed sometime in Mars’ turbulent past, when another object slammed into the northern lowlands of the planet, leaving a scar fifty miles wide and more than a mile deep. Mary Beth Griggs, The Verge, "Mars orbiter sends a picture-perfect postcard back to Earth," 21 Dec. 2018 The data can also show interesting things over non-frozen areas of the planet, though. Scott K. Johnson, Ars Technica, "ICESat-2 successfully starts lasering Earth, telling us about it," 5 Oct. 2018 The United States of America does more than any country on the face of the planet. Fox News, "'Angel moms' weigh in on the immigration debate," 24 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'planet.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of planet

14th century, in the meaning defined at sense 1a

History and Etymology for planet

Middle English planete, from Anglo-French, from Late Latin planeta, modification of Greek planēt-, planēs, literally, wanderer, from planasthai to wander — more at floor

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Statistics for planet

Last Updated

11 Mar 2019

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Time Traveler for planet

The first known use of planet was in the 14th century

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More Definitions for planet

planet

noun
plan·​et | \ ˈpla-nət How to pronounce planet (audio) \

Kids Definition of planet

: any large heavenly body that orbits a star (as the sun)

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More from Merriam-Webster on planet

Rhyming Dictionary: Words that rhyme with planet

Thesaurus: All synonyms and antonyms for planet

Spanish Central: Translation of planet

Nglish: Translation of planet for Spanish Speakers

Britannica English: Translation of planet for Arabic Speakers

Britannica.com: Encyclopedia article about planet

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