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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.

Pesarik argued he didn’t deserve the penalty because he had attention-deficit hyperactivity disorder and other ills.

From The Wall Street Journal • Mar. 6, 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

Synthetic dyes are often added to make foods look more appealing, especially products aimed at children, but a growing body of evidence indicates they may contribute to behavioral problems such as hyperactivity and inattention.¹

From Science Daily • Nov. 7, 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