Meaning of “hyperactive” in the English Dictionary

"hyperactive" in British English

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hyperactiveadjective

uk /ˌhaɪ.pərˈæk.tɪv/ us /ˌhaɪ.pɚˈæk.tɪv/

(Definition of “hyperactive” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"hyperactive" in American English

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hyperactiveadjective [ not gradable ]

us /ˌhɑɪ·pəˈræk·tɪv/

(esp. of children) extremely or unusually active:

She wanted to keep her hyperactive son busy.

(Definition of “hyperactive” from the Cambridge Academic Content Dictionary © Cambridge University Press)