hyperactivity

American  

[hahy-per-ak-tiv-i-tee] / ˌhaɪ pər ækˈtɪv ɪ ti /

noun

1. the condition of being hyperactive.

2. hyperkinesia.

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hyperactivity Scientific  

/ hī′pər-ăk-tĭv′ĭ-tē /

1. An abnormally high level of activity or excitement shown by a person, especially a child, that interferes with the ability to concentrate or interact with others.

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Etymology

Origin of hyperactivity

First recorded in 1885–90; hyperactive + -ity

Example Sentences

Children also are on screens more than ever, which is believed to contribute to more anxiety, depression, aggression and hyperactivity.

From Los Angeles Times • Feb. 17, 2026

"These results also provide a potential explanation for how stimulants treat hyperactivity, which previously seemed paradoxical," Dosenbach added.

From Science Daily • Dec. 29, 2025

It was at least the fourth time in less than a year that then 8-year-old Trent Davis, who has autism and attention-deficit hyperactivity disorder, had run away from home, police reports show.

From The Wall Street Journal • Nov. 18, 2025

Holly Harris, 23, from Jersey, said she was told she had attention deficit hyperactivity disorder when she was 19 years old.

From BBC • Oct. 26, 2025

These so-called comorbidities—meaning the conditions co-occur with Internet addiction—include “attention-deficit hyperactivity, mood, anxiety and personality disorders.”

From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel