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
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 opens up opportunities for interstellar travel. — Ameya Paleja, Interesting Engineering, 23 June 2026 As radio waves travel across the universe, interstellar gas muddies them, generating a characteristic delay in the signal that depends on frequency. — Phil Plait, Scientific American, 26 June 2026 Voyager 2 passed Jupiter, Saturn, Uranus, and Neptune before reaching interstellar space in 2018. — Kory Grow, Rolling Stone, 24 June 2026 Last year, Loeb raised the possibility that the interstellar comet 3I/ATLAS could have alien origins. — CBS News, 1 July 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

Rhymes for interstellar

See All Rhymes for interstellar

Browse Nearby Words

interstation
interstellar
interstellar line
See all Nearby Words

Cite this Entry

“Interstellar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interstellar. Accessed 10 Jul. 2026.

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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

More from Merriam-Webster on interstellar

Thesaurus: All synonyms and antonyms for interstellar

Nglish: Translation of interstellar for Spanish Speakers

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