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 McClain spent 204 days on an interstellar adventure during NASA Expeditions 58/59. Molly Longman,, "An Astronaut’s Guide To Coping With Isolation," 24 June 2020 Astronomers are no longer only looking for interstellar radio stations, but for optical pulses, waste heat generated by powerful civilizations, and any other signs of crafty extraterrestrials. Nadia Drake, National Geographic, "My dad launched the quest to find alien intelligence. It changed astronomy.," 19 June 2020 New Horizons is on a course to interstellar space, much like the Voyager probes. Ashley Strickland, CNN, "NASA spacecraft sends back images of stars from 4.3 billion miles away," 14 June 2020 This spacefaring exploration title from the makers of Sword & Sworcery has players take on the role of Mei, an interstellar scout who's been slumbering for over a thousand years. Jess Grey, Wired, "Here's Every PS5 Game Sony Just Announced," 11 June 2020 The second interstellar object ever discovered, comet 2I/Borisov was first spotted on Aug. 30, 2019 by astronomer Gennady Borisov. Fox News, "Mysterious interstellar comet Borisov survived its encounter with the sun, new study says," 6 June 2020 The mystery surrounding the interstellar object 'Oumumua seemingly gets weirder by the day. Fox News, "Mysterious interstellar 'Oumuamua could be made of something almost unheard of in science," 2 June 2020 This is only the second interstellar object to cross into our solar system after 'Oumuamua was spotted in 2017. Ashley Strickland, CNN, "Scientists get first look inside comet from outside our solar system," 20 Apr. 2020 The first interstellar object to be spotted in our solar system exploded researchers’ assumptions about what sorts of bodies are most likely to escape their host star, and how. Charlie Wood, Popular Science, "A new ’Oumuamua theory could mean many more interstellar visitors are headed our way," 14 Apr. 2020

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.

See More

First Known Use of interstellar

1626, in the meaning defined above

Keep scrolling for more

Learn More about interstellar

Time Traveler for interstellar

Time Traveler

The first known use of interstellar was in 1626

See more words from the same year

Statistics for interstellar

Last Updated

2 Jul 2020

Cite this Entry

“Interstellar.” Dictionary, Merriam-Webster, Accessed 8 Jul. 2020.

Keep scrolling for more

More Definitions for interstellar


How to pronounce interstellar (audio)

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

Keep scrolling for more

More from Merriam-Webster on interstellar

Thesaurus: All synonyms and antonyms for interstellar

Rhyming Dictionary: Words that rhyme with interstellar

Spanish Central: Translation of interstellar

Nglish: Translation of interstellar for Spanish Speakers

Comments on interstellar

What made you want to look up interstellar? Please tell us where you read or heard it (including the quote, if possible).


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

A More Exception(al) Quiz

  • hot dog  hot dog  hot dog  hot dog cat
  • Which of the following words is not a synonym for ‘a young person’?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!