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.
It has been talked about for quite a while, and some scientists even believe that life on Earth may have arrived through panspermia, originating somewhere in deep space before being brought to our planet. Monisha Ravisetti, Space.com, 16 Jan. 2025 SpaceX’s Starship achieved its first successful landing, which is a critical milestone for future deep space missions. Zhenbo Wang, Discover Magazine, 31 Dec. 2024 Rapid reuse will be essential if SpaceX wants to reach its goal of dramatically reducing the time and cost of getting cargo and people into orbit and to deep space. Marta Musso, WIRED, 14 Oct. 2024 Old-school radios convert currents into sound, but radio telescopes record the current to construct a picture of deep space. Matthew Hutson, The New Yorker, 24 Sep. 2024 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

Dictionary Entries Near deep space

Cite this Entry

“Deep space.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep%20space. Accessed 5 Feb. 2025.

Kids Definition

deep space

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

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