spacefaring
spa·ce·fa·ring
noun
1.
a voyage outside the Earth''s atmosphere
Origin
From space + faring, by analogy with seafaring.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.