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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
With the patches now in place, NICER is expected to resume its X-ray observations of deep space phenomena.
—Robert Z. Pearlman, Space.com, 16 Jan. 2025
Advancements in Space Exploration In 2025, humanity will continue experiments in deep space exploration and take a baby step toward the commercialization of outer space by forming permanent habitats on the moon through private business ventures and government initiatives.
—Mark Minevich, Forbes, 29 Dec. 2024
Panama recently signed an MOU to join the China-Russia moon station and to engage in deep space exploration with China.
—Didi Kirsten Tatlow, Newsweek, 18 Dec. 2024
These policy changes would save around $2 billion a year in NASA’s deep space budget.
—Ars Technica, 30 Sep. 2024
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Word History
First Known Use
1865, in the meaning defined above
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 23 Jan. 2025.
Kids Definition
deep space
noun
: space outside the earth's atmosphere and especially that part lying beyond the earth-moon system
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