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

Additional research linked consumption to increased hyperactivity in children.

From Salon • Apr. 11, 2026

Darren said that by the age of six or seven, changes in Sophia's behaviour had become more noticeable, including hyperactivity and mood swings.

From BBC • Mar. 31, 2026

Strong clinical evidence supports melatonin's short term benefits for children with neurodevelopmental disorders such as autism and attention deficit hyperactivity disorder.

From Science Daily • Mar. 15, 2026

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