from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A syndrome, usually diagnosed in childhood, characterized by a persistent pattern of impulsiveness, a short attention span, and often hyperactivity, and interfering especially with academic, occupational, and social performance.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun neurology, pathology A
developmental disorderin which a person has a persistent pattern of impulsivenessand inattention, with or without a component of hyperactivity.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a condition (mostly in boys) characterized by behavioral and learning disorders
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