the condition of being hyperactive.

Origin of hyperactivity

First recorded in 1885–90; hyperactive + -ity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for hyperactivity

add, ADHD, hyperactivity

Examples from the Web for hyperactivity

Contemporary Examples of hyperactivity

  • ADHD is a chronic condition that includes difficulty sustaining attention, hyperactivity and impulsive behavior.

    The Daily Beast logo
    Faking ADHD Gets You Into Harvard

    Heidi Mitchell

    January 25, 2012

Historical Examples of hyperactivity

Word Origin and History for hyperactivity

1852, from hyper- + activity.

Online Etymology Dictionary, © 2010 Douglas Harper

hyperactivity in Medicine




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.

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.