Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The science and technology of space flight.

from the GNU version of the Collaborative International Dictionary of English.

  • noun the theory and practice of navigation through the upper atmosphere or outer space; the science of travel in space.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Navigation through space.
  • noun The science and technology of spaceflight.

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

  • noun the theory and practice of navigation through air or space

Etymologies

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