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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.

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The plaintiffs argue that Tylenol use during pregnancy can lead to autism or attention deficit hyperactivity disorder in children.

From Barron's Jul. 13, 2026

A Kenvue spokesman said the ruling Monday “does not change the fact that credible, independent science shows no proven link between taking acetaminophen and autism or attention-deficit hyperactivity disorder.”

From The Wall Street Journal Jul. 13, 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 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




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