hyperactive
adjective
hy·per·ac·tive
ˌhī-pər-ˈak-tiv 
1
: affected with or exhibiting hyperactivity
broadly
: more active than is usual or desirable
2
: intricately or elaborately designed or detailed
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
The hyperactive news cycle demands everyone create some kind of schema for figuring out what’s going on, and our era is typified with crackpot right-wing conspiracies that fill that void.
—
Literary Hub, 7 Oct. 2025
However, people with ASD are more likely to have trouble shifting their focus rather than being easily distracted and hyperactive in general.
—Laura Dorwart, Health, 29 Sep. 2025
The anterior cingulate cortex, your brain’s conflict detector, becomes hyperactive in ambiguous situations.
—Anne-Laure Le Cunff, Big Think, 29 Sep. 2025
Advertisement Halladay says there is not enough safety data on the drug in children—much less children with autism, who may have additional medical issues—and some anecdotal reports find that leucovorin can make some children with autism more hyperactive.
—Alice Park, Time, 23 Sep. 2025
See All Example Sentences for hyperactive
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Literary Hub, 7 Oct. 2025
However, people with ASD are more likely to have trouble shifting their focus rather than being easily distracted and hyperactive in general.
—Laura Dorwart, Health, 29 Sep. 2025
The anterior cingulate cortex, your brain’s conflict detector, becomes hyperactive in ambiguous situations.
—Anne-Laure Le Cunff, Big Think, 29 Sep. 2025
Advertisement Halladay says there is not enough safety data on the drug in children—much less children with autism, who may have additional medical issues—and some anecdotal reports find that leucovorin can make some children with autism more hyperactive.
—Alice Park, Time, 23 Sep. 2025
See All Example Sentences for hyperactive
Cite this Entry
“Hyperactive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperactive. Accessed 13 Oct. 2025.
Copy CitationKids Definition
hyperactive
adjective
hy·per·ac·tive
ˌhī-pər-ˈak-tiv
: very active especially to an abnormal amount
hyperactivity
noun
-ak-ˈtiv-ət-ē
Medical Definition
hyperactive
1 of 2 adjective
hy·per·ac·tive
ˌhī-pə-ˈrak-tiv
: 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
Kathy Fackelmann, Science NewsA 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
David Gates. Newsweek
broadly
: more active than is usual or desirable
hyperactive
2 of 2 noun
: an individual who is hyperactive
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