hy·​per·​ac·​tiv·​i·​ty | \ ˌhī-pər-ˌak-ˈti-və-tē How to pronounce hyperactivity (audio) \

Definition of hyperactivity

1 : the state or condition of being overly active Canada geese are disarmingly expressive. … They disdain the frantic hyperactivity of smaller birds.— Benjamin B. Bachman
2 : increased levels of function or activity especially when considered abnormally excessive She had developed delusions of invincibility, along with bouts of hyperactivity and severe insomnia.— Per Ola and Emily D'Aulaire especially : higher than usual levels of movement and activity (such as excessive talking or fidgeting) typically associated with attention deficit disorder An estimated 1 in 50 school-age children in the United States, receive stimulant medication to help quell inattentiveness and hyperactivity. — Christine Mlot

Examples of hyperactivity in a Sentence

Recent Examples on the Web But clearly legible are the duo’s aesthetic hyperactivity, neo-baroque sensibility and simultaneous attraction to and dissatisfaction with digital image-making. Washington Post, "In the galleries: A towering exhibit offers a new definition of domestic life," 1 Jan. 2021 The actor’s chaos energy and angular hyperactivity could’ve made for an alien, bizarro-world Biden. Kathryn Vanarendonk, Vulture, "The One Thing All Great SNL Political Impressions Need," 19 Jan. 2021 Pee-wee’s hyperactivity matched his visual maximalism, though; Torres has a deadpan stillness at odds with his twink-from-space look. Michael Schulman, The New Yorker, "The Otherworldly Comedy of Julio Torres," 21 Dec. 2020 Diagnosing a child with attention-deficit/hyperactivity disorder isn’t straightforward. Erica Komisar, WSJ, "Online Class and False ADHD Diagnoses," 20 Dec. 2020 Interferon hyperactivity may feed the immune storm that can turn COVID-19 fatal 1 week or more after symptoms appear, adds Andre Strydom, an expert in the neurobiology of DS at King’s College London who was senior author on the Annals paper. Meredith Wadman, Science | AAAS, "COVID-19 is 10 times deadlier for people with Down Syndrome, raising calls for early vaccination," 15 Dec. 2020 Studies have linked depression, anxiety, attention-deficit hyperactivity disorder, risk-taking and aggression to sleep disorders in children and adults. Sandee Lamotte, CNN, "Survive election uncertainty with these expert tips on how to cope," 4 Nov. 2020 In the July 7 incident, a resident who was diagnosed with post-traumatic stress disorder, major depressive disorder and attention-deficit/hyperactivity disorder, cut himself with a pair of scissors after participating in a craft group. Glenn Howatt, Star Tribune, "East Bethel behavioral center cited for violating state, federal regulations," 14 Oct. 2020 For instance, children who show signs of inattention or hyperactivity and are suspected of having ADHD are sometimes just dealing with trauma. oregonlive, "Portland Public Schools psychologists feel stretched thin, say reassignments inequitable as district adjusts fall staffing," 2 Oct. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hyperactivity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hyperactivity

1888, in the meaning defined at sense 1

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Time Traveler for hyperactivity

Time Traveler

The first known use of hyperactivity was in 1888

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Statistics for hyperactivity

Last Updated

18 Feb 2021

Cite this Entry

“Hyperactivity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperactivity. Accessed 2 Mar. 2021.

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More Definitions for hyperactivity


hy·​per·​ac·​tiv·​i·​ty | \ ˌhī-pə-ˌrak-ˈtiv-ət-ē How to pronounce hyperactivity (audio) \
plural hyperactivities

Medical Definition of hyperactivity

: a state or condition of being excessively or pathologically active especially : attention deficit disorder

More from Merriam-Webster on hyperactivity

Nglish: Translation of hyperactivity for Spanish Speakers

Britannica.com: Encyclopedia article about hyperactivity

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