interstellar

adjective

in·​ter·​stel·​lar ˌin-tər-ˈste-lər 

: 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

Just because a volatile molecule is in a comet or the interstellar medium doesn’t mean much for a planetary atmosphere, Nikku Madhusudhan, the paper’s lead author and an astrophysicist at the university of Cambridge in the U.K., tells me via email. —Bruce Dorminey, Forbes.com, 26 Apr. 2025

Despite the cold, icy conditions of interstellar clouds scattered between star systems, these regions contain a variety of prebiotic molecules. —Jack Knudson, Discover Magazine, 22 Apr. 2025

Both spacecraft entered interstellar space decades after liftoff, and have sent back to Earth some of the most fascinating and important astrophysics information to date. —Monisha Ravisetti, Space.com, 11 Apr. 2025

These interstellar fireworks are vivid and speedy, and can come in all sorts of colors—notably white, yellow, and green—due to the remnants of metal. —Stephanie Vermillion, Outside Online, 13 Feb. 2025

Word History

First Known Use

1626, in the meaning defined above

Rhymes for interstellar

• cerebellar
• circumstellar
• columellar
• storyteller
• beller
• cellar
• dweller
• eller
• feller
• meller
• sellar
• seller

Kids Definition

interstellar

adjective

in·​ter·​stel·​lar ˌint-ər-ˈstel-ər 

: located or taking place among the stars

interstellar space