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

These compounds are important building blocks for living things, and with luminous red novas making such a significant contribution to interstellar dust, these events could have also played a key role in supplying the raw materials needed for life on Earth. —Robert Lea, Space.com, 22 Jan. 2026

One of York's major interests was exploring the dust and gas that lies between stars and galaxies, known respectively as the interstellar and intergalactic medium, the U of C said. —Adam Harrington, CBS News, 18 Jan. 2026

These two architectural masterworks are separated by two hours on the TGV, but the otherworldliness of La Tourette makes the trip interstellar. —Vishaan Chakrabarti, Air Mail, 17 Jan. 2026

According to a study published today in Monthly Notices of the Royal Astronomical Society, J1007+3540 is erupting like a volcano and spewing plasma across interstellar space. —Andrew Paul, Popular Science, 15 Jan. 2026

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