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.
The startup’s microwave-sized batteries provide years of energy in remote environments like deep space and the seabed by using heat from nuclear waste. Hayley Cuccinello, CNBC, 5 June 2025 The annual event, which typically takes place in late February or early March, features astronomy talks, astrophotography meetups, family-friendly sky-watching tours, and telescope viewing to spy on deep space. Stephanie Vermillion, Outside Online, 30 May 2025 China is set to launch its second Tianwen deep space exploration mission late May, targeting both a near-Earth asteroid and a main belt comet, Space News reports. ArsTechnica, 23 May 2025 In 2023, Voyager 1 started sending gibberish from deep space, but that issue was resolved last year. Scott Neuman, NPR, 20 May 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 Jun. 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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