attention deficit disorder
noun /əˌtenʃn ˈdefɪsɪt dɪsɔːdə(r)/
/əˌtenʃn ˈdefɪsɪt dɪsɔːrdər/
(also attention deficit hyperactivity disorder)
[uncountable] (abbreviation ADD, ADHD)
- a medical condition, especially in children, that makes it difficult for them to pay attention to what they are doing, to stay still for long and to learn things