deep space

noun

: space well outside the earth's atmosphere and especially that part lying beyond the earth-moon system

Examples of deep space in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Key Takeaways The Orion spacecraft is being designed to survive deep space while prioritizing human safety. — Mrigakshi Dixit, Interesting Engineering, 6 Nov. 2026 These are the first pair of smart binoculars that can identify targets in the night sky, such as planets, stars and deep space objects. — Harry Bennett, Space.com, 6 Nov. 2026 Earth is embroiled in a seemingly endless conflict against alien bugs from deep space. — K. Thor Jensen, PC Magazine, 26 Oct. 2026 While the Starship spacecraft is a 171-foot-tall colossus designed to transport people to deep space, Dragon is a 13-foot-wide capsule fit to carry about four astronauts at a time to low-Earth orbit, where the International Space Station resides. — Jackie Wattles, CNN Money, 30 Sep. 2026 See All Example Sentences for deep space

Word History

First Known Use

1865, in the meaning defined above

Time Traveler
The first known use of deep space was in 1865

Browse Nearby Words

Cite this Entry

“Deep space.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep%20space. Accessed 8 Nov. 2026.

Kids Definition

deep space

noun
: space outside the earth's atmosphere and especially that part lying beyond the earth-moon system
Love words? Need even more definitions?

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