hy·per·ac·tiv·i·ty | \ ˌhī-pər-ˌak-ˈti-və-tē \

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

Schizophrenia, bipolar disorder, anxiety disorders and attention-deficit hyperactivity disorder (ADHD) are strongly correlated with one another, as well as with major depression. The Economist, "A big collaboration is trying to understand diseases of the psyche," 28 June 2018 Three-year-old Afia had a severe speech impairment along with acute attention deficit hyperactivity problems. Eam Asaduzzaman And Shababa Iqbal, The Christian Science Monitor, "School in Bangladesh builds confidence for autistic students – and their parents," 10 July 2018 Fields, who traveled to the rally from his Ohio home, told the judge that he is being treated for bipolar disorder, anxiety, depression and attention-deficit/hyperactivity disorder. Hannah Natanson, Washington Post, "Man charged with driving into crowd at Charlottesville ‘Unite the Right’ rally pleads not guilty to hate crimes," 5 July 2018 The amygdala, a subcortical brain structure that responds to threat, can become hijacked: Children who experienced parental deprivation show amygdala hyperactivity, meaning the brain is more likely to signal danger even when there is none. Dylan Gee, Vox, "I study kids who were separated from their parents. The trauma could change their brains forever.," 20 June 2018 Some of the hyperactivity symptoms include frequently feeling restless, fidgety, frequently squirming or moving their hands and feet while sitting, or leaving their seats in meetings when they would be expected to remain seated. Andrea K. Mcdaniels, baltimoresun.com, "Children aren't the only ones with ADHD; adults get it as well," 17 May 2018 Overstimulation led to more enjoyment of cocaine, less sensitization to it and ever more hyperactivity. Erik Vance, Scientific American, "Sorry, Mom and Dad, Toys Cannot Supercharge Your Baby," 15 May 2018 These include tremors, aggressiveness (biting and kicking), hyperactivity, distinct up and down head movements, a hesitant and faltering gait, loss of limb control, occasional falls, and difficulty getting up. Beth Mole, Ars Technica, "Camels in Africa may have been quietly spreading prion disease for decades," 26 Apr. 2018 And had paradoxical results in some such as hyperactivity, severe constipation, seizures, nightmares, and many others. Philly.com, "Why codeine doesn't belong in children's medications," 16 Jan. 2018

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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Last Updated

9 Aug 2018

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Time Traveler for hyperactivity

The first known use of hyperactivity was in 1888

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More Definitions for hyperactivity


hy·per·ac·tiv·i·ty | \ ˌhī-pə-ˌrak-ˈtiv-ət-ē \
plural hyperactivities

Medical Definition of hyperactivity 

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

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