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Definitions

hyperactivity

[hahy-per-ak-tiv-i-tee] / ˌhaɪ pər ækˈtɪv ɪ ti /
NOUN
attention deficit disorder
Synonyms


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.

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

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

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

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