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
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.
That team is gearing up for New Horizons' crossing of the termination shock, one of the key outer boundaries between our heliosphere and interstellar space, Poppe told Space.com. Leonard David, Space.com, 19 Feb. 2025 The physical limitations of modern spacecraft pose significant challenges for reaching interstellar space in a human lifetime, especially with limited room onboard for carrying propellant or batteries. Victoria Corless, Space.com, 22 Jan. 2025 Voyager 1 left the heliosphere and reached interstellar space in August 2012 and is 15.5 billion miles away, and Voyager 2 − traveling slower and in a different direction − did the same in November 2018 and is now roughly 13 billion miles from Earth. Stephen J. Beard, USA TODAY, 9 Jan. 2025 Unlike fainter interstellar sights such as the northern lights, the brightest planets are visible even in light-polluted cities. Stephanie Vermillion, Outside Online, 15 Jan. 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

Browse Nearby Words

Cite this Entry

“Interstellar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interstellar. Accessed 6 Mar. 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

Last Updated: - Updated example sentences
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