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Synonyms

deep space

American  

noun

  1. space beyond the limits of the solar system.


deep space British  

noun

  1. any region of outer space beyond the system of the earth and moon

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of deep space

First recorded in 1950–55

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

High-energy particles from the Sun and deep space can also trigger computer errors that force spacecraft into "safe mode," temporarily shutting down nonessential systems until engineers resolve the issue.

From Science Daily • May 15, 2026

The £37m deal includes the station's 44 antennas, as well as the Goonhilly Lunar and Deep Space, believed to be the world's first private deep space communications network.

From BBC • May 15, 2026

Unlike earlier missions, Artemis is designed with longer-term goals in mind, including future crewed landings and the development of infrastructure that could support deep space exploration.

From Salon • Apr. 11, 2026

"When you're out in deep space by the Moon, and you are listening to a video they recorded for you before you launch. That's something," the Canadian astronaut told a press conference.

From Barron's • Apr. 9, 2026

They made a formal recommendation that we organize an international cooperative program, with new and immense radio telescopes, to probe the reaches of deep space for electromagnetic signals making sense.

From "The Lives of a Cell" by Lewis Thomas

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