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Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. travel through space in order to visit and explore other worlds

from the GNU version of the Collaborative International Dictionary of English

  • n. the process of travelling in or into outer space.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a voyage outside the Earth's atmosphere

Etymologies

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Examples

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