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
Manage Play Styles Excitable, high-energy play indoors can lead to more hyperactive behavior.
—
Lucy Notarantonio, MSNBC Newsweek, 16 July 2025
The interior Northwest and North Central U.S. will experience the greatest heat, bringing with it continued amounts of drought and a potentially hyperactive wildfire season.
—Renny Vandewege, Forbes.com, 12 May 2025
There are two main kinds of A.D.H.D., inattentive and hyperactive/impulsive, and children in one category often seem to have little in common with children in the other.
—Paul Tough Eric Jason Martin Krish Seenivasan Brian St. Pierre, New York Times, 13 Apr. 2025
Girls may, for example, struggle with time management, daydreaming or being a chatterbox and are more likely to be diagnosed with the primarily inattentive type of ADHD over the hyperactive type.
—Daliah Singer, Smithsonian Magazine, 9 July 2025
See All Example Sentences for hyperactive
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Lucy Notarantonio, MSNBC Newsweek, 16 July 2025
The interior Northwest and North Central U.S. will experience the greatest heat, bringing with it continued amounts of drought and a potentially hyperactive wildfire season.
—Renny Vandewege, Forbes.com, 12 May 2025
There are two main kinds of A.D.H.D., inattentive and hyperactive/impulsive, and children in one category often seem to have little in common with children in the other.
—Paul Tough Eric Jason Martin Krish Seenivasan Brian St. Pierre, New York Times, 13 Apr. 2025
Girls may, for example, struggle with time management, daydreaming or being a chatterbox and are more likely to be diagnosed with the primarily inattentive type of ADHD over the hyperactive type.
—Daliah Singer, Smithsonian Magazine, 9 July 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 2 Aug. 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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