geosynchronous

adjective

geo·​syn·​chro·​nous ˌjē-ō-ˈsiŋ-krə-nəs How to pronounce geosynchronous (audio)
-ˈsin-
: being or having an orbit around the earth with a period equal to one sidereal day
specifically : geostationary

Examples of geosynchronous in a Sentence

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.
The first-stage booster made a successful 21st liftoff, but was expended to get the satellite to a geosynchronous transfer orbit. Richard Tribou, The Orlando Sentinel, 22 Mar. 2026 Article continues below The Falcon 9's upper stage, meanwhile, continued carrying EchoStar XXV to distant geosynchronous transfer orbit, where the satellite was deployed on schedule 35 minutes after liftoff. Mike Wall, Space.com, 10 Mar. 2026 Despite the anomaly, the Vulcan rocket successfully completed its mission, deploying a payload into geosynchronous orbit. Eric Lagatta, USA Today, 27 Feb. 2026 Moreover, based on the radiation data collected in orbit and models of space environments, the researchers estimate that their system could survive a whopping 271 years in geosynchronous orbit, where radiation levels are much higher than in low Earth orbit. Rupendra Brahambhatt, Interesting Engineering, 21 Feb. 2026 See All Example Sentences for geosynchronous

Word History

First Known Use

1968, in the meaning defined above

Time Traveler
The first known use of geosynchronous was in 1968

Browse Nearby Words

Cite this Entry

“Geosynchronous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geosynchronous. Accessed 27 Mar. 2026.

Love words? Need even more definitions?

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

More from Merriam-Webster