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

It is characterized by persistent patterns of inattention, hyperactivity, and impulsivity that can interfere with daily life, including school, work, and relationships.

From Science Daily • Mar. 17, 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

Their claim that acetaminophen—the main active ingredient in Tylenol—can cause autism and attention deficit hyperactivity disorder if taken during pregnancy was rejected in federal multi-district litigation in 2023.

From The Wall Street Journal • Oct. 29, 2025

When Joani Reisen goes without her medicine for attention-deficit hyperactivity disorder, she says it feels like “squirrels running everywhere” in her mind.

From MarketWatch • Oct. 21, 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