Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • abbr. attention deficit hyperactivity disorder

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Initialism of attention deficit hyperactivity disorder.

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

  • n. a condition (mostly in boys) characterized by behavioral and learning disorders

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