Definitions

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

  • abbreviation National Aeronautics and Space Administration

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

  • initialism National Aeronautics and Space Administration, a civilian agency of the government of the United States of America, charged with space and aeronautical research and space exploration.
  • initialism National Auto Sport Association, a US organization promoting motor racing, founded in 1991.

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

  • noun an independent agency of the United States government responsible for aviation and spaceflight

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