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We found one dictionary with English definitions that includes the word national aeronautics and space administration:
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1. National Aeronautics and Space Administration: Dictionary.com [home, info]

Quick definitions from WordNet (National aeronautics and space administration) ▸ noun:  an independent agency of the United States government responsible for aviation and spaceflight ▸ Words similar to national aeronautics and space administration ▸ Words that often appear near national aeronautics and space administration ▸ Rhymes of national aeronautics and space administration ▸ Invented words related to national aeronautics and space administration