interstellar

adjective

in·​ter·​stel·​lar ˌin-tər-ˈste-lər How to pronounce interstellar (audio)
Synonyms of interstellarnext
: located, taking place, or traveling among the stars especially of the Milky Way galaxy

Examples of interstellar in a Sentence

Recent Examples on the Web
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All of this ancient-looking hardware was tasked with overseeing the operational safety of the Voyager craft, which are currently well over 16 billion miles from Earth in interstellar space. Mack Degeurin, Popular Science, 2 Apr. 2026 Ryland then unwittingly finds himself on an interstellar mission that includes meeting an alien, Rocky. Jazz Tangcay, Variety, 31 Mar. 2026 His titles explore futuristic worlds with interstellar conflicts, drawing inspiration from favorites growing up like Star Trek, Halo and Mass Effect. Kansas City Star, 31 Mar. 2026 The enrichment of deuterium in 3I/ATLAS also tells us about the interstellar comet's origins. Keith Cooper, Space.com, 30 Mar. 2026 See All Example Sentences for interstellar

Word History

First Known Use

1626, in the meaning defined above

Time Traveler
The first known use of interstellar was in 1626

Browse Nearby Words

Cite this Entry

“Interstellar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interstellar. Accessed 4 Apr. 2026.

Kids Definition

interstellar

adjective
in·​ter·​stel·​lar ˌint-ər-ˈstel-ər How to pronounce interstellar (audio)
: located or taking place among the stars
interstellar space

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