A syndrome formerly thought to affect children only, but now known also to affect adults, that is characterized by frequent, chronic distractibility, and either inattentiveness or hyperactivity (fidgeting).

plural of attention deficit disorder

Alternative form of attention deficit hyperactivity disorder

(neurology, pathology, psychiatry, psychology) A developmental disorder in which a person has a persistent pattern of impulsiveness and inattention, with or without a component of hyperactivity.