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.

Her latest album, "ADHDara," is inspired by her "hyperactivity".

From Barron's • May 17, 2026

Rivera, who lives in South Gate, has a 6-year-old daughter who is autistic and has attention deficit hyperactivity disorder and a 16-year-old son who is autistic and nonverbal.

From Los Angeles Times • Apr. 13, 2026

Additional research linked consumption to increased hyperactivity in children.

From Salon • Apr. 11, 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

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

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