interplanetary

adjective

in·​ter·​plan·​e·​tary ˌin-tər-ˈpla-nə-ˌter-ē How to pronounce interplanetary (audio)
: existing, carried on, or operating between planets
interplanetary dust
an interplanetary flight
interplanetary spacecraft

Examples of interplanetary 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.
Bitcoin would be used to underwrite energy resource development, infrastructure revitalization, and most importantly, interplanetary expansion. Dave Birnbaum, Forbes, 21 Nov. 2024 Human interplanetary exploration will be more dangerous and more costly, especially if robots can do the work, and the lack of a discernible economic return a greater obstacle. Michael Hiltzik, Los Angeles Times, 16 Oct. 2024 In the aftermath of hurricane winds and rains, under clear conditions in Cape Canaveral, a SpaceX Falcon Heavy rocket blasted into the sky carrying NASA’s newest interplanetary spacecraft: Europa Clipper. Jay Bennett, Smithsonian Magazine, 14 Oct. 2024 That does not mean U.S. taxpayers would foot the bill for Musk’s dream of interplanetary travel. Simon Shuster, TIME, 21 Nov. 2024 See all Example Sentences for interplanetary 

Word History

First Known Use

1691, in the meaning defined above

Time Traveler
The first known use of interplanetary was in 1691

Dictionary Entries Near interplanetary

Cite this Entry

“Interplanetary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interplanetary. Accessed 21 Dec. 2024.

Kids Definition

interplanetary

adjective
in·​ter·​plan·​e·​tary
ˌint-ər-ˈplan-ə-ˌter-ē
: between planets
interplanetary space
interplanetary travel

More from Merriam-Webster on interplanetary

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!