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 Galaxy Book5 Pro 360 is a productivity powerhouse, with a 25-hour battery and an AI chipset that keeps up with my hyperactive brain.
—
Juhi Wadia, PC Magazine, 23 Mar. 2026
The Gators’ spot in the Associated Press rankings reads much like a hyperactive EKG.
—Dana O’Neil, CNN Money, 11 Mar. 2026
In resistant hypertension, this signaling becomes hyperactive, driving persistent elevation despite medication.
—Memorialcare, Oc Register, 16 Feb. 2026
Gabriel Martinelli was next on the scene, then Jurrien Timber, who was followed by a jubilant William Saliba, cavorting like a hyperactive toddler.
—James McNicholas, New York Times, 4 Feb. 2026
See All Example Sentences for hyperactive
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Juhi Wadia, PC Magazine, 23 Mar. 2026
The Gators’ spot in the Associated Press rankings reads much like a hyperactive EKG.
—Dana O’Neil, CNN Money, 11 Mar. 2026
In resistant hypertension, this signaling becomes hyperactive, driving persistent elevation despite medication.
—Memorialcare, Oc Register, 16 Feb. 2026
Gabriel Martinelli was next on the scene, then Jurrien Timber, who was followed by a jubilant William Saliba, cavorting like a hyperactive toddler.
—James McNicholas, New York Times, 4 Feb. 2026
See All Example Sentences for hyperactive
Cite this Entry
“Hyperactive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperactive. Accessed 27 Mar. 2026.
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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