Dictionary.com
Thesaurus.com
Synonyms

interstellar space

American  
[in-ter-stel-er spays] / ˌɪn tərˈstɛl ər ˈspeɪs /

noun

  1. Astronomy. the region of outer space between stars, especially within a galaxy such as the Milky Way.


interstellar space Scientific  
  1. See under space


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Comet 3I/ATLAS is only the third confirmed object ever observed entering our solar system from interstellar space, following 1I/'Oumuamua and 2I/Borisov.

From Science Daily ● Sep. 9, 2026

The results suggest that 3I/ATLAS formed in a very different chemical environment before beginning its journey through interstellar space.

From Science Daily ● Jun. 4, 2026

“It’s quite reasonable to assume that since humanity has sent spacecraft into interstellar space, other civilizations might do the same thing,” Croft says.

From The Wall Street Journal ● Apr. 23, 2026

If you were starting today, going to the moon or anywhere beyond, and especially into interstellar space, would be a job for robots and, often, exclusively robots.

From The Wall Street Journal ● Feb. 10, 2026

We sent something about our genes, something about our brains, and something about our libraries to other beings who might sail the sea of interstellar space.

From "Cosmos" by Carl Sagan

Vocabulary.com logo
by dictionary.com

Just like flashcards, but way more fun

Don't take our word for it. Leave the boring studying behind and join VocabTrainer today. You'll learn even faster and never look back.

Take me to Vocabulary.com