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.
But today, perhaps because of the scale of planetary challenges as well as to the material inequalities evident among and within states, a backlash against this trend has surfaced. Henry A. Kissinger, Foreign Affairs, 18 Nov. 2024 Brown, a professor of planetary astronomy at Caltech, discovered another small world called Eris in the Kuiper Belt — a vast ring of icy objects beyond Neptune’s orbit that also happens to be the former ninth planet’s neighborhood. Jacopo Prisco, CNN, 5 Nov. 2024 Today, the extrasolar planetary count is pushing 6000. Bruce Dorminey, Forbes, 5 Nov. 2024 The spacecraft is scheduled to spend 18 months studying Apophis during and after its Earth encounter, providing unprecedented insights into how planetary flybys can reshape such ancient space rocks. Thomas G. Moukawsher, Newsweek, 5 Nov. 2024 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 23 Nov. 2024.

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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!