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.
This vast interplanetary institution is a consortium of representatives from all points of the universe. Jeff Spry, Space.com, 19 Mar. 2025 Her character evolves from working behind the scenes to eventually becoming Secretary-General, using her sharp intelligence and ruthless pragmatism to protect Earth while navigating complex interplanetary politics. Ryan Brennan, Charlotte Observer, 19 Mar. 2025 Rivals are projecting a 60% drop this weekend for director Bong Joon Ho’s interplanetary comedy, now looking to cross $33 million in its first 10 days of release — a disappointing return on what was a $118 million production. J. Kim Murphy, Variety, 15 Mar. 2025 In the early to mid-2010s, Musk took advantage of a different era of technology coverage—one that was more gadget-focused and largely uncritical—to hype his ideas for the future of transportation and interplanetary exploration. Charlie Warzel, The Atlantic, 12 Mar. 2025 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

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Cite this Entry

“Interplanetary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interplanetary. Accessed 30 Mar. 2025.

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

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