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outer space

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noun
  1. space beyond the atmosphere of the earth.
  2. deep space.
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Origin of outer space

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for outer space

outer space

noun
  1. (not in technical usage) any region of space beyond the atmosphere of the earth
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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