interstellar

adjective

in·​ter·​stel·​lar ˌin-tər-ˈste-lər How to pronounce interstellar (audio)
: 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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The object, eventually confirmed to almost certainly be a comet and named 3I/ATLAS, was later confirmed to have interstellar origins after follow-up observations. Eric Lagatta, USA Today, 3 Nov. 2025 Dark filaments of interstellar dust thread through the nebula scene, can be seen blocking the light of the nebula clouds beyond. Anthony Wood, Space.com, 31 Oct. 2025 Preliminary estimates indicate that the interstellar comet is 3 billion to 11 billion years old, according to a study coauthored by Seligman and Aster Taylor, a doctoral student and Fannie and John Hertz Foundation Fellow at the University of Michigan, in August. Ashley Strickland, CNN Money, 30 Oct. 2025 Separately, scientists reported the dramatic brightening of the interstellar object—which was originally discovered back in July this year—in a preprint study, which has yet to be peer-reviewed. Hannah Millington, MSNBC Newsweek, 30 Oct. 2025 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

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Cite this Entry

“Interstellar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interstellar. Accessed 4 Nov. 2025.

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

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