planetary

adjective

plan·​e·​tary ˈpla-nə-ˌter-ē How to pronounce planetary (audio)
1
a
: 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
2
a
: 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

Examples of planetary in a Sentence

a positively planetary new shopping development
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Venus and Saturn, for example, will appear extremely close to one another on Jan. 17 and Jan. 18 in what astronomers call a planetary conjunction. Tariq Malik, Space.com, 11 Jan. 2025 The month comes to a close with a brilliant new moon in the same sign on Jan. 29, followed by Uranus (Aquarius’ planetary ruler) going direct the very next day. Valerie Mesa, People.com, 10 Jan. 2025 January is a treasure trove for planetary enthusiasts, offering an extraordinary chance to view multiple planets. Daniel R. Depetris, Newsweek, 10 Jan. 2025 The second priority identified in the most recent planetary decadal survey is an orbiter and atmospheric probe to explore Uranus and its icy moons. Stephen Clark, Ars Technica, 8 Jan. 2025 See all Example Sentences for planetary 

Word History

First Known Use

1607, in the meaning defined at sense 1a

Time Traveler
The first known use of planetary was in 1607

Dictionary Entries Near planetary

Cite this Entry

“Planetary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/planetary. Accessed 21 Jan. 2025.

Kids Definition

planetary

adjective
plan·​e·​tary ˈplan-ə-ˌter-ē How to pronounce planetary (audio)
1
a
: of or relating to a planet
b
: having a motion like that of a planet
planetary electrons of the atomic nucleus
2
: worldwide, global
a matter of planetary concern

More from Merriam-Webster on planetary

Last Updated: - Updated example sentences
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