unusually or abnormally active: a company's hyperactive growth; the child's hyperactive imagination.
(of children) displaying exaggerated physical activity sometimes associated with neurologic or psychologic causes.

Origin of hyperactive

First recorded in 1865–70; hyper- + active
Related formshy·per·ac·tion [hahy-per-ak-shuh n] /ˌhaɪ pərˈæk ʃən/, nounhy·per·ac·tive·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for hyperactive



abnormally active
Derived Formshyperaction, nounhyperactivity, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hyperactive

1852, from hyper- + active.

Online Etymology Dictionary, © 2010 Douglas Harper

hyperactive in Medicine




Highly or excessively active, as a gland.
Having behavior characterized by constant overactivity.
Afflicted with attention deficit disorder.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.