hy·​per·​ac·​tive | \ ˌhī-pər-ˈak-tiv How to pronounce hyperactive (audio) \

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 Staffers continue to praise the turbocharged 2.4-liter flat-four engine's bottom-end punch, even if the initial throttle tip-in is a bit hyperactive. David Beard, Car and Driver, "Our Subaru Ascent Drinks Heavily When Towing," 24 Jan. 2020 Between these delays, the field seems to flip at a rate as fast as five times every million years, and these periods are then punctuated with hyperactive spurts. National Geographic, "Earth's magnetic field flips much more frequently than we thought," 2 Oct. 2019 Disney’s Hollywood Studios, meanwhile, gets into the Christmas spirit with the hyperactive projection and pyrotechnics presentation, Jingle Bell, Jingle Bam. Arthur Levine, USA TODAY, "Theme park holiday preview: How Disney, Universal Studios and other parks are celebrating," 18 Dec. 2019 Hunter was joined at our scrum by his chief of staff, Joe Kasper, a hyperactive, talkative, former A-10 mechanic who lived on the constant give and take of congressional politics and would later become an assistant Navy secretary under Trump. Matt Farwell, The New Republic, "Duncan Hunter Did Something Right," 6 Dec. 2019 In people, says Dr Melis, hyperactive dopamine neurons of this sort are a feature of vulnerability to a range of psychiatric disorders that include schizophrenia, mania and drug addiction. The Economist, "In rats, cannabis during pregnancy rewires the brains of offspring," 19 Oct. 2019 For example, the amygdala, which is an important part of the brain for processing danger, tends to be enlarged and hyperactive after exposure to stress over a long period of time. NBC News, "The brain science behind trauma-informed education," 6 Sep. 2019 Most notable here is David James as Rachel’s hyperactive publicist, Sy Spector. Mike Giuliano, baltimoresun.com, "In Toby’s Dinner Theatre production of ‘The Bodyguard,’ a lot of Whitney goes a long way," 3 Oct. 2019 In a bizarre attempt at stylization, the play features the young people occasionally interrupting their discussion with hyperactive dance breaks. Frank Scheck, The Hollywood Reporter, "'Sunday': Theater Review," 24 Sep. 2019

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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Time Traveler for hyperactive

Time Traveler

The first known use of hyperactive was in 1867

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Statistics for hyperactive

Last Updated

7 Feb 2020

Cite this Entry

“Hyperactive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperactive. Accessed 16 Feb. 2020.

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More Definitions for hyperactive


How to pronounce hyperactive (audio)

English Language Learners Definition of hyperactive

: extremely active or too active


hy·​per·​ac·​tive | \ ˌhī-pər-ˈak-tiv How to pronounce hyperactive (audio) \

Kids Definition of hyperactive

: extremely or overly active


hy·​per·​ac·​tive | \ ˌhī-pə-ˈrak-tiv How to pronounce hyperactive (audio) \

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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