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.
Despite its potential, using atomic explosives on asteroids presents significant challenges, including the need for heavy-lift rockets capable of launching massive payloads into deep space. — Mrigakshi Dixit, Interesting Engineering, 3 Aug. 2026 Four adults will spend a year isolated in two enclosures meant to simulate both traveling through deep space and living on Mars. — Regina G. Barber, NPR, 31 July 2026 The tracking station is part of NASA’s Deep Space Network, operating in concert with similar facilities in California and Australia to provide global coverage as Earth’s rotation brings the planets, stars, and deep space probes in and out of view. — Stephen Clark, ArsTechnica, 24 July 2026 However, evidence of an ancient alien civilization and a frantic distress call from deep space instantly cut those celebrations short. — Paul Brett, Space.com, 10 July 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

Rhymes for deep space

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Browse Nearby Words

Deep South
deep space
deep state
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Cite this Entry

“Deep space.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep%20space. Accessed 5 Aug. 2026.

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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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