|attention deficit hyperactivity disorder|
|ADHD a form of attention deficit disorder in which hyperactivity is a prominent symptom|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a fool or simpleton; ninny.|
|attention deficit hyperactivity disorder
A syndrome of disordered behavior, usually diagnosed in childhood, characterized by a persistent pattern of impulsiveness, inattentiveness, and sometimes hyperactivity that interferes with academic, occupational, or social performance. Also called attention deficit disorder.