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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
Four years after a cloud of particles from deep space cast a glittering purple glow over Earth’s night sky, the Czech government has been the first to step up and launch an investigatory mission, with South Korea nipping at their heels.
—David Rooney, The Hollywood Reporter, 21 Feb. 2024
In it, a former priest is assigned to explore a signal from deep space that's sent to a remote observatory and just happens to summon a fearsome thorned monster to Earth through a portal.
—Julie Hinds, Detroit Free Press, 14 Feb. 2024
The high-definition streaming video was sent to Earth via laser from deep space.
—Aliza Chasan, CBS News, 18 Dec. 2023
China’s lunar ambitions come as more countries are elevating their space programs eyeing the potential scientific benefit, national prestige and access to resources and further deep space exploration that successful moon missions and other developments could bring.
—Simone McCarthy, CNN, 26 Feb. 2024
Also on board: an innovative sensor using radio waves to accurately determine how much cryogenic propellant is left in a tank in the weightless environment of space, technology expected to prove useful for downstream moon missions and other deep space voyages.
—William Harwood, CBS News, 22 Feb. 2024
Their mission will be to travel around the Moon and confirm the spacecraft’s systems operate as designed in a real deep space environment.
—Teny Sahakian, Fox News, 18 Feb. 2024
What are some of the human health challenges in exploring deep space?
—Nicholas Stfleur, STAT, 16 Feb. 2024
Partnering more often with private industry will hopefully free up NASA to focus on building spacecraft and rockets for deep space missions, including human missions to the moon and Mars.
—Eric Lagatta, USA TODAY, 16 Jan. 2024
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'deep space.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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 24 Apr. 2024.
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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