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
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The indigenous technology, crucial for satellite servicing, space station operations, and interplanetary missions, positions India to play a significant role in the commercial and exploratory frontiers of space. Reuters, NBC News, 16 Jan. 2025 Additionally, the company says the launch system will eventually be capable of carrying up to 100 people on long-duration interplanetary flights. Matthew Glasser, ABC News, 16 Jan. 2025 The rocket system is being developed with the ambitious goal of enabling lunar and interplanetary missions, including NASA's Artemis program, which aims to return astronauts to the moon before the end of the decade. Hannah Parry, Newsweek, 16 Jan. 2025 The interplanetary spacecraft successfully started its mission toward Europa, the fourth-largest moon of Jupiter, the eldest and most enormous planet in our solar system. Joe Spring, Smithsonian Magazine, 20 Dec. 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 1 Feb. 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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