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
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Previous Oscar art portfolios gave us Kenny Scharf launching the little gold man into deep space, Karon Davis recasting him as an ancient Egyptian deity and Austyn Weiner turning him into a mischievous mail-art project. Michael Slenske, HollywoodReporter, 14 Mar. 2026 The company introduced the more powerful Falcon Heavy, which is essentially three Falcon 9 rockets strapped together, with its debut launch in 2018 flying Musk’s red Tesla roadster into deep space. Richard Tribou, The Orlando Sentinel, 14 Mar. 2026 The new simulator reproduces galactic cosmic rays using ion accelerators, giving researchers a powerful tool to study radiation exposure in deep space. Aamir Khollam, Interesting Engineering, 13 Mar. 2026 Now, Artemis 2 will verify the capsule's ability to support astronauts in deep space. Josh Dinner, Space.com, 12 Mar. 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

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Cite this Entry

“Deep space.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep%20space. Accessed 15 Mar. 2026.

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
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