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

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

"In our situation, we assume that the shift in membrane composition is triggered by hyperactivity of the affected neurons due to Alzheimer's disease. That is, these neurons exhibit abnormal firing."

From Science Daily • Apr. 11, 2026

Additional research linked consumption to increased hyperactivity in children.

From Salon • Apr. 11, 2026

Most of his teachers were ill-equipped to handle his behavioral problems, later diagnosed as attention-deficit hyperactivity disorder and obsessive-compulsive disorder.

From The Wall Street Journal • Mar. 1, 2026

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