hyperactivity

American

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

noun

the condition of being hyperactive.
hyperkinesia.

hyperactivity Scientific

/ hī′pər-ăk-tĭv′ĭ-tē /

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.

Etymology

Origin of hyperactivity

First recorded in 1885–90; hyperactive + -ity

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Additional research linked consumption to increased hyperactivity in children.

From Salon • Apr. 11, 2026

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

His hyperactivity for much of the day - leaping about his technical area and gesturing madly in the manner of a man at a rave - had gone.

From BBC • Dec. 14, 2025

And the more I began to appreciate what she did for my family, the less her accent and hyperactivity bothered me.

From "Where Things Come Back" by John Corey Whaley

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023