hy·per·ac·tive | \ˌhī-pər-ˈak-tiv \

Definition of hyperactive 

1 : affected with or exhibiting hyperactivity broadly : more active than is usual or desirable

2 : intricately or elaborately designed or detailed

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Other Words from hyperactive

hyperactive noun

Examples of hyperactive in a Sentence

the skyrocketing price of oil resulted in a wildly fluctuating, hyperactive stock market hyperactive children who are in dire need of a guardian with a firm hand

Recent Examples on the Web

On Twitter The lawsuit comes as Aldrin’s verified Twitter account with 1.4 million followers, @TheRealBuzz, became hyperactive on June 18 after more than a month of dormancy. Eric Berger, Ars Technica, "Buzz Aldrin returns to Twitter, sues his son and former manager," 23 June 2018 A month later, Lee went to Hong Kong with his parents and stayed for 18 years, growing up as the rebellious son of a privileged family, a hyperactive kid who picked fights, loved attention, and was a talented actor and dancer. Jeff Baker, The Seattle Times, "‘Bruce Lee: A Life’: a remarkable life, from Seattle to Hong Kong," 26 June 2018 Last year’s hyperactive hurricane season ruined so many vacations, including yours, unfortunately. Christopher Elliott, BostonGlobe.com, "A hurricane ruined his St. Thomas honeymoon, so why is the airline keeping his money?," 13 Mar. 2018 Her hyperactive mind and seemingly boundless energy translate to spellbinding concerts that recall her late mentor and friend Prince, both in their relentless vibrancy and their bold optimism for music’s — and the world’s — future. BostonGlobe.com, "The week ahead: music, theater, art, and more," 13 July 2018 Rather than being hyperactive like children, adults with ADHD report experiencing an internal sense of fidgetiness and restlessness. Rene Hernandez-cardenache, Psy.d., M.s. Ed., miamiherald, "A focus on distraction: A closer look at adult ADHD," 2 July 2018 Dustin was their fifth child, a hyperactive mess of red hair who sometimes preached at his father’s church in tiny Ekalaka, Montana. Alden Woods, azcentral, "Granite Mountain Hotshots: Five years on, Dustin DeFord's family finds peace in faith," 29 June 2018 Jake Morgendorffer, on the other hand, is hyperactive and charmingly clueless, hellbent on spending quality time with his daughters. Cady Drell, Marie Claire, "9 'Daria' Details I'm Praying to See in MTV's Reboot," 22 June 2018 During ablation surgery, a doctor snakes a catheter into the heart to intentionally scar these hyperactive hot spots. Jacqueline Detwiler, Popular Mechanics, "This Pro Skydiver Was Invincible—Until his Heart Stopped Beating Regularly," 22 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hyperactive.' 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 hyperactive

1867, in the meaning defined at sense 1

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Statistics for hyperactive

Last Updated

5 Sep 2018

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Time Traveler for hyperactive

The first known use of hyperactive was in 1867

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More Definitions for hyperactive



English Language Learners Definition of hyperactive

: extremely active or too active


hy·per·ac·tive | \ˌhī-pər-ˈak-tiv \

Kids Definition of hyperactive

: extremely or overly active


hy·per·ac·tive | \ˌhī-pə-ˈrak-tiv \

Medical Definition of hyperactive 

(Entry 1 of 2)

: affected with or exhibiting hyperactivity Scientists suspect in certain genetically susceptible people, the immune cells remain hyperactive long after the infectious agent has been cleared from the body.— Kathy Fackelmann, Science News, 23 Oct. 1993 A growing number of parents suspect that the powerful stimulant Ritalin—long prescribed for its paradoxically tranquilizing effect on hyperactive children—has become a convenience for teachers seeking quiet classrooms … — David Gates. Newsweek, 23 Nov. 1987 broadly : more active than is usual or desirable



Medical Definition of hyperactive (Entry 2 of 2)

: an individual who is hyperactive

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