attention deficit hyperactivity disorder
noun
- behavioural disorder characterized by deficiency in ability to pay attention
Wiktionary
noun
- A developmental disorder in which a person has difficulty to concentrate and a persistent pattern of impulsiveness and inattention, with or without a component of hyperactivity.
“Having attention deficit hyperactivity disorder, or ADHD, is associated with a shorter life expectancy and a greater risk of mental health issues, according to a new study of more than 30,000 people with the disorder in the United Kingdom.”