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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At some point, the batteries aboard each 47-year-old spacecraft will finally die, rendering the scientific probes into interstellar monuments to themselves. Andrew Paul, Popular Science, 5 Mar. 2025 The duo's findings could be useful in the future because the research suggests clues that could be used to indicate interstellar visitors that originate from Alpha Centauri. Robert Lea, Space.com, 5 Mar. 2025 Scientific American senior news reporter Meghan Bartels follows two beloved spacecraft, Voyagers 1 and 2, on their epic tour past the outer planets, across the edge of the sun’s influence (the heliosphere) and into interstellar space. Jeanna Bryner, Scientific American, 18 Mar. 2025 Then, in 2012 and 2018, respectively, each entered interstellar space, giving scientists the first-ever close-up observations of the cosmos beyond our solar system. Meghan Bartels, Scientific American, 6 Mar. 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 12 Apr. 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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