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English definition of “hyperactive”

hyperactive

adjective     /ˌhaɪ.pər'æk.tɪv/ US  /-pɚ-/
Someone who is hyperactive has more energy than is normal, gets excited easily, and cannot stay still or think about their work: Hyperactive children often have poor concentration and require very little sleep. → See also hyperBecoming too excited and easily upset hyperactivity     /-ækˈtɪv.ɪ.ti/ US  /-ækˈt̬ɪv.ə.t̬i/ noun [U] Becoming too excited and easily upset
(Definition of hyperactive adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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