D defs.my
Entry 1 sense Webster, 1913

hyperactivity

· IPA /hˌaɪpəræktˈɪvɪtiː/
01 n. An unusually high level of activity; -- used especially with respect to children who move around frequently and do not sit still very long,…
  1. 1.
    An unusually high level of activity; -- used especially with respect to children who move around frequently and do not sit still very long, most noticeably in school. It is sometimes associated with attention deficit disorder. See: attention deficit disorder