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[hahy-per-ak-tiv-i-tee] /ˌhaɪ pər ækˈtɪv ɪ ti/
the condition of being hyperactive.
1885-90; hyperactive + -ity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hyperactivity
  • It'll give you a better shot at getting cash advances and help avoid having your account frozen due to suspicious hyperactivity.
  • The disorder is genetic, according to some researchers, and it usually manifests itself first as childhood hyperactivity.
  • Boys are three times as likely to receive a diagnosis of attention-deficit hyperactivity disorder.
  • Some of them take antidepressants and drugs to control hyperactivity.
  • Sugar and refined wheat should be avoided for kids with food-related hyperactivity triggers.
  • The other risk is that foreign hyperactivity turns into a distraction from economic reform.
  • That's why they are showing behaviors of hyperactivity, negative behavior and aggression.
  • hyperactivity is a state of too much muscle activity.
  • Hand tremors, irritability, and hyperactivity in children are fairly common.
  • Problems in attention and hyperactivity are common in children with sleep apnea.
Word Origin and History for hyperactivity

1852, from hyper- + activity.

Online Etymology Dictionary, © 2010 Douglas Harper
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hyperactivity in Medicine

hyperactivity hy·per·ac·tiv·i·ty (hī'pər-āk-tĭv'ĭ-tē)
A general restlessness or excess of movement, as that in children with minimal brain dysfunction or hyperkinesis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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hyperactivity in Science
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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