plan·​e·​tary | \ ˈpla-nə-ˌter-ē How to pronounce planetary (audio) \

Definition of planetary

1a : of, relating to, being, or resembling a planet
c : having a motion like that of a planet planetary electrons
d : immense the scope of this project has reached planetary proportions
2a : of, relating to, or belonging to the earth : terrestrial
b : global, worldwide planetary politics
3 : having or consisting of an epicyclic train of gear wheels

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Examples of planetary in a Sentence

a positively planetary new shopping development
Recent Examples on the Web Thomas hopes her readers will adopt more of McCartney’s planetary devotion, and reevaluate their own clothes-buying behavior. Cintra Wilson, The New York Review of Books, "Waste Not, Shop Not," 11 Feb. 2020 Because the strange patterns are so strikingly geometric, researchers from the University of Cadiz in Spain have taken a closer look at the bright spots to figure out whether humans and machines look at planetary images differently. Courtney Linder, Popular Mechanics, "AI Will Probably Trick Us Into Thinking We Found Aliens," 2 Feb. 2020 The system that gave us this bijou of Streamline Moderne design also brought us here, to the brink of planetary collapse. Aaron Timms, The New Republic, "Privacy Policy," 27 Jan. 2020 Mike Watkins, director of the Southern California lab, will be heading a team responsible for tracking a planetary rover, the Mars 2020 project's main focus. CBS News, "Venus' past could teach scientists about Earth's future: "They probably started off similarly"," 25 Jan. 2020 Tracked over time, this planetary signature manifests as a telltale stellar wobble—which registers as an oscillation between the red and blue ends of a star’s spectrum. Lee Billings, Scientific American, "The Curious Case of Proxima C," 15 Jan. 2020 Venus Our nearest planetary neighbor will be fairly high in the western sky this winter. Nicole Clausing, Sunset Magazine, "Cold Air, Bright Stars, Can’t Lose: Why Winter’s Best for Stargazing," 2 Jan. 2020 But statistics can't prepare you for the almost planetary scale of the place. Harry Pearson, Condé Nast Traveler, "To Best Experience Alaska’s Burgeoning Local Food Movement, Go in Winter," 20 Dec. 2019 At this early stage in the evolution of a planetary system, the rocky cores are still surrounded by a gaseous disk left over from the formation of the parent star. Bradley Hansen, The Conversation, "What moons in other solar systems reveal about planets like Neptune and Jupiter," 2 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'planetary.' 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 planetary

1607, in the meaning defined at sense 1a

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Time Traveler for planetary

Time Traveler

The first known use of planetary was in 1607

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Statistics for planetary

Last Updated

14 Feb 2020

Cite this Entry

“Planetary.” Dictionary, Merriam-Webster, Accessed 17 Feb. 2020.

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More Definitions for planetary


How to pronounce planetary (audio)

English Language Learners Definition of planetary

technical : of or relating to planets


plan·​e·​tary | \ ˈpla-nə-ˌter-ē How to pronounce planetary (audio) \

Kids Definition of planetary

1 : of or relating to a planet
2 : having a motion like that of a planet

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