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[hahy-per-ak-tiv] /ˌhaɪ pərˈæk tɪv/
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
1865-70; hyper- + active
Related forms
[hahy-per-ak-shuh n] /ˌhaɪ pərˈæk ʃən/ (Show IPA),
hyperactively, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hyperactive
  • One shrubby perennial is so popular with these hyperactive birds, it's commonly called hummingbird trumpet.
  • hyperactive behavior usually refers to a group of characteristics.
  • The content of the article made me sleepy and hyperactive at the same time.
  • Interestingly, hyperactive children were more calm after playing.
  • Other characters all boast memorable traits, from the hyperactive undercover waitress to the endlessly dancing detective.
  • It's a process in which your senses are hyperactive and yet your self-awareness is strangely diminished.
  • Even those boys described as hyperactive by their teachers showed no adverse effects from the sugary meal, which was consumed.
  • For hyperactive children, insomniacs and wimpy parents, nature films followed.
  • Ironically, the judgment will be unconsciously welcomed by the problem gambler's voracious and hyperactive conscience.
  • They tend to be hyperactive and are often boisterous at inappropriate moments.
British Dictionary definitions for hyperactive


abnormally active
Derived Forms
hyperaction, noun
hyperactivity, 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
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Word Origin and History for hyperactive

1852, from hyper- + active.

Online Etymology Dictionary, © 2010 Douglas Harper
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hyperactive in Medicine

hyperactive hy·per·ac·tive (hī'pər-āk'tĭv)

  1. Highly or excessively active, as a gland.

  2. Having behavior characterized by constant overactivity.

  3. 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.
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