1 planet | Definition of planet

planet

noun
plan·​et | \ ˈpla-nÉ™t 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-​nÉ™t-​ËŒlÄ«k 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

Anti-foreign sentiments from politicians and public officials have fostered ill feelings between South Africans and African migrants competing for meager opportunities in the most unequal country on the planet. Daniel Gallan, CNN, "South Africa: Madagascar joins Zambia in football boycott," 5 Sep. 2019 As perhaps the finest shot stopper on the planet, Atletico Madrid goalkeeper Jan Oblak leads the way with a £90m valuation, but that still looks like a bargain for a player of his quality. SI.com, "The 20 Most Valuable Squads in World Football," 4 Sep. 2019 The storm — the strongest anywhere on the planet this year — made landfall Sunday afternoon on the southern end of the Bahamas’ Elbow Cay, which runs along the east coast of Great Abaco. Cnn.com Wire Service, The Mercury News, "Hurricane Dorian: Live hurricane tracker shows where storm may hit Florida or other states," 1 Sep. 2019 Sleep is quite possibly the greatest thing on the planet. Maddie Hiatt, House Beautiful, "Say Hello To The Mattress Made Specifically For Hot Sleepers," 26 Aug. 2019 All the evidence pointed to a spectacular conclusion: Aboriginal people belong to the oldest continuous culture on the planet. David Maurice Smith, Smithsonian, "A 42,000-Year-Old Man Finally Goes Home," 23 Aug. 2019 Silicon Valley is among the most expensive places to live on the planet. The Economist, "How robotic furniture will improve our lives," 23 Aug. 2019 After all, not everyone on the planet is lucky enough to know what froyo is. Wired, "Google Gives up Sweets: New OS Is Just Called Android 10," 22 Aug. 2019 As much as anyone on the planet, Grant was Du Bois’s natural enemy. Ian Frazier, The New Yorker, "When W. E. B. Du Bois Made a Laughingstock of a White Supremacist," 19 Aug. 2019

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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More Definitions for planet

planet

noun
plan·​et | \ ˈpla-nÉ™t 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