in·​ter·​stel·​lar | \ ˌin-tər-ˈste-lər How to pronounce interstellar (audio) \

Definition of interstellar

: 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 This tells us that something is likely happening between the stars — in the interstellar space separating them — that's being elongated into thread-like features over enormous distance scales: around ~20 light-years across, typically. Ethan Siegel, Forbes, 1 June 2021 Scientists now think that magnetic reconnection also takes place in interstellar space and occurs at the outer boundaries of the expanding plumes driven out of our galaxy's center. Amy Woodyatt, CNN, 30 May 2021 In 2012, after making a series of discoveries on Jupiter and Saturn, the vessel exited the solar system and entered into interstellar space, the space between stars., 17 May 2021 Voyager 1 entered interstellar space in 2012, and Voyager 2 followed in 2018. NBC News, 12 May 2021 After entering interstellar space, Voyager 1's Plasma Wave System instrument detected oscillations in the gas, which is caused by our sun. Amy Woodyatt, CNN, 11 May 2021 So why not explore the solar system and interstellar space using CubeSat solar sails? Jamie Carter, Forbes, 9 Apr. 2021 Researchers think there is more low-level activity in the interstellar gas than was previously believed. Amy Woodyatt, CNN, 11 May 2021 Science instruments on the Interstellar Probe will find out: How the Sun’s plasma interacts with interstellar gas to create our heliosphere. Jamie Carter, Forbes, 27 Apr. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'interstellar.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of interstellar

1626, in the meaning defined above

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Time Traveler for interstellar

Time Traveler

The first known use of interstellar was in 1626

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Statistics for interstellar

Last Updated

9 Jun 2021

Cite this Entry

“Interstellar.” Dictionary, Merriam-Webster, Accessed 17 Jun. 2021.

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More Definitions for interstellar



English Language Learners Definition of interstellar

: existing or occurring between stars


in·​ter·​stel·​lar | \ ˌin-tər-ˈste-lər How to pronounce interstellar (audio) \

Kids Definition of interstellar

: existing or taking place among the stars interstellar gases

More from Merriam-Webster on interstellar

Thesaurus: All synonyms and antonyms for interstellar

Nglish: Translation of interstellar for Spanish Speakers


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