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.
Bracketing his interest in interplanetary communication, this impasse means everything to Chaplin; her expansive claims for the Franklin stove’s importance click into place. Dan Piepenbring, Harper's Magazine, 19 Feb. 2025 Various interplanetary spacecraft can use the specific positioning of planets to perform gravity assists, effectively slingshotting them with a speed boost toward their final destination. Stefanie Waldek, Space.com, 19 Feb. 2025 Even assuming that life’s menu of nutrients is identical across the cosmos, however, other hurdles remain before this method could manifest in some sort of measuring device on an actual interplanetary astrobiology mission. Gayoung Lee, Scientific American, 5 Feb. 2025 First the festivals, then New York and L.A., then the world would bear witness to her childhood fears, her daily passions and frustrations, her minutely observed existence, all tastefully packaged within, for instance, a buddy comedy or an interplanetary embezzlement plot. Hannah Gold, Harper's Magazine, 19 Feb. 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 14 Mar. 2025.

Kids Definition

interplanetary

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

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