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.
Sam’s science fiction action adventure spotlights life on the margins if also on the fringes of deep space, its two main characters a pair of well-meaning outcasts outrunning the law. Manuel Muñoz, Literary Hub, 11 Sep. 2025 In the last few years, researchers have stumbled upon baffling signals from deep space, uncovered strange features hiding beneath our oceans, and found clues that hint at life’s secrets on other worlds. Kaif Shaikh, Interesting Engineering, 11 Sep. 2025 Scientists have developed a more efficient way to generate oxygen for astronauts that could help with future missions into deep space. Andrew Jones, Space.com, 2 Sep. 2025 To maintain contact with space probes, the radio signals sent back and forth between Earth and deep space contain special ranging codes, which act as a kind of measuring tape or ruler. IEEE Spectrum, 25 Aug. 2025 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 16 Sep. 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
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