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

The rocket was left flying in deep space after launching a commercial Moon lander in 2025. — Stephen Clark, ArsTechnica, 21 Aug. 2026

The Falcon 9 rocket was launched in early 2025 on a one-way mission to carry lunar landers into deep space. — Antonio Pequeño Iv, Forbes.com, 19 Aug. 2026

That’s equivalent to 193 days and 131 days, respectively, of unnecessary deep space radiation exposure, the scientists noted. — Marcia Dunn, Los Angeles Times, 15 Aug. 2026

In comparison, the Space Launch System rocket current Block 1B version can handle 38 metric tons, or 84,000 pounds, to deep space including the Orion spacecraft and its crew. — Richard Tribou, The Orlando Sentinel, 13 Aug. 2026

Word History

First Known Use

1865, in the meaning defined above

Rhymes for deep space

• abase
• airspace
• apace
• backspace
• biface
• birthplace
• blackface
• boldface
• bookcase
• braincase
• briefcase
• carcase

Kids Definition

deep space

noun

: space outside the earth's atmosphere and especially that part lying beyond the earth-moon system