deep space

noun
Updated on: 16 Apr 2018

Definition of deep space

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

Recent Examples of deep space from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'deep space.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of deep space

circa 1952

in the meaning defined above

See Words from the same year
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