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deep space

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noun
  1. space beyond the limits of the solar system.

Origin of deep space

First recorded in 1950–55
Also called outer space.
Related formsdeep-space, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for deep space

deep space

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

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