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en.wikipedia.org/wiki/Outer_space

Outer space, or just space, is the void that exists between celestial bodies, including Earth. .... The sparse density of matter in outer space means that electromagnetic radiation can travel great distances without being scattered: the mean free ...

www.merriam-webster.com/dictionary/outer%20space

Define outer space: space immediately outside the earth's atmosphere; broadly : interplanetary or interstellar space — outer space in a sentence.

www.dictionary.com/browse/outer-space

Outer space definition, space beyond the atmosphere of the earth. See more.

dictionary.cambridge.org/us/dictionary/english/outer-space

outer space definition, meaning, what is outer space: the part of space that is very far away from Earth. Learn more.

www.collinsdictionary.com/us/dictionary/english/outer-space

Outer space definition: Outer space is the area outside the earth's atmosphere where the other planets and stars... | Meaning, pronunciation, translations and ...

www.thefreedictionary.com/outer+space

Any region of space beyond limits determined with reference to the boundaries of a celestial body or system, especially: a. The region of space immediately ...

www.vocabulary.com/dictionary/outer%20space

When a spacecraft travels beyond the Earth's atmosphere, it goes into outer space, which is generally defined as all the space in between every astronomical  ...

www.learnersdictionary.com/definition/outer%20space

Definition of outer space written for English Language Learners from the Merriam -Webster Learner's Dictionary with audio pronunciations, usage examples, and ...

www.thesaurus.com/browse/outer%20space

Synonyms for outer space at Thesaurus.com with free online thesaurus, antonyms, and definitions. Dictionary and Word of the Day.