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
Groff argues that this hyperactive pace erodes not just productivity, but our physical, mental, emotional, and spiritual well-being.
—
Rodger Dean Duncan, Forbes.com, 19 Aug. 2025
Enter evenamide, a first-in-class drug that selectively targets hyperactive neurons, especially in the hippocampus.
—New Atlas, 11 Aug. 2025
Since emerging as a hyperactive, scaffolding-scaling rapper in the early 2010s, MGK — formerly Machine Gun Kelly, born Colson Baker — has forged his own path through the pop-cultural consciousness.
—Maura Johnston, Rolling Stone, 11 Aug. 2025
In some cases, however, microglia and other immune cells become hyperactive and go into overdrive, thus causing inflammation and possible damage.
—Sandee Lamotte, CNN Money, 7 Aug. 2025
See All Example Sentences for hyperactive
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Rodger Dean Duncan, Forbes.com, 19 Aug. 2025
Enter evenamide, a first-in-class drug that selectively targets hyperactive neurons, especially in the hippocampus.
—New Atlas, 11 Aug. 2025
Since emerging as a hyperactive, scaffolding-scaling rapper in the early 2010s, MGK — formerly Machine Gun Kelly, born Colson Baker — has forged his own path through the pop-cultural consciousness.
—Maura Johnston, Rolling Stone, 11 Aug. 2025
In some cases, however, microglia and other immune cells become hyperactive and go into overdrive, thus causing inflammation and possible damage.
—Sandee Lamotte, CNN Money, 7 Aug. 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 5 Sep. 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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