hyperkinesis🔊nounUK /ˌhaɪpə(ɹ)kɪˈniːsɪs/Etymology From hyper- + -kinesis.1Medicine, Pathology, Sciences Abnormally increased and sometimes uncontrollable activity or muscular movements.2Medicine, Pathology, Sciences A condition especially of childhood characterized by hyperactivity.Synonymshyperkinesia, hyperkinetic disorder, attention deficit hyperactivity disorder