cis·​lu·​nar (ˌ)sis-ˈlü-nər How to pronounce cislunar (audio)
: lying between the earth and the moon or the moon's orbit
cislunar space

Examples of cislunar in a Sentence

Recent Examples on the Web Where will Coordinated Lunar Time be used? LTC will be used in operations in cislunar space, the region around the Earth that extends to the moon and past its orbit. George Petras, USA TODAY, 23 Apr. 2024 Engineers sought to protect satellites in Earth orbit and avoid creating additional debris in cislunar space, Astrobotic said. George Petras, USA TODAY, 20 Jan. 2024 That motive still exists in the U.S.-China rivalry, but now both countries are working toward building an enduring presence on the moon and in cislunar space, the real estate between the moon and Earth. Christian Davenport, Washington Post, 13 Nov. 2023 That interest is apparent: Last year, the Space Force identified cislunar operations as a development priority, and in April established the 19th Space Defense Squadron to oversee cislunar space. Denise Chow, NBC News, 22 Jan. 2023 The Space Force must grow significantly as the economic and military competition with China expands outward from low-earth and medium-earth orbits toward cislunar space. Jerry Hendrix, National Review, 17 Mar. 2022 As the name implies, DARPA envisions DRACO operating primarily in cislunar space, or the area of space between Earth and the moon. Kyle Mizokami, Popular Mechanics, 14 Apr. 2021 These guiding principles apply to international and commercial partnerships that will operate in the space between the Earth and the moon, known as cislunar space. Ashley Strickland, CNN, 14 Oct. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'cislunar.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

circa 1877, in the meaning defined above

Time Traveler
The first known use of cislunar was circa 1877

Dictionary Entries Near cislunar

Cite this Entry

“Cislunar.” Dictionary, Merriam-Webster, Accessed 3 Jun. 2024.

Kids Definition


cis·​lu·​nar (ˈ)sis-ˈlü-nər How to pronounce cislunar (audio)
: lying between the earth and the moon or the moon's orbit
Last Updated: - Updated example sentences
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