as in heated
being in a state of increased activity or agitation
the boy manages to panic himself by his own overactive imagination
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Example Sentences
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Recent Examples of overactive
Sepsis is considered a life-threatening medical emergency that occurs when the body has an extreme, overactive response to an infection, causing the immune system to damage its own tissues and organs, according to the Centers for Disease Control and Prevention.
—
Steve Reed,
Los Angeles Times,
23 May 2026
The Immune System in Overdrive At the center of HS is an overactive immune response—one that begins with a seemingly small event inside the hair follicle.
—
Lauryn Higgins,
Flow Space,
6 May 2026
Studies show the drug works by affecting brain chemicals such as glutamate and dopamine to help calm the overactive signals in the brain linked to agitation.
—
Dr. Jennifer Miao,
ABC News,
1 May 2026
Red or Dark Skin With an overactive thyroid, your circulation increases.
—
Brandi Jones,
Health,
28 Apr. 2026
See All Example Sentences for overactive
Steve Reed,
Los Angeles Times,
23 May 2026
The Immune System in Overdrive At the center of HS is an overactive immune response—one that begins with a seemingly small event inside the hair follicle.
—
Lauryn Higgins,
Flow Space,
6 May 2026
Studies show the drug works by affecting brain chemicals such as glutamate and dopamine to help calm the overactive signals in the brain linked to agitation.
—
Dr. Jennifer Miao,
ABC News,
1 May 2026
Red or Dark Skin With an overactive thyroid, your circulation increases.
—
Brandi Jones,
Health,
28 Apr. 2026
See All Example Sentences for overactive
Recent Examples of Synonyms for overactive
Adjective
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Other players have covered their mouths while speaking to opponents during the World Cup, but a red card is only issued if the conversation occurs during a confrontation or heated exchange.
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The living room has hardwood floors and beamed ceilings; the kitchen includes a peninsula and a sitting area that opens to a balcony; and the primary suite features a bath with heated floors.
Adjective
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While the online retailer is serving up some excellent K-beauty deals—up to 40% off markdowns—our beauty editors are most excited about Medicube deals.
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While the Athletics hosted the Angels in Sacramento, their Single-A affiliate minor league team, Stockton Ports, hosted lots of dads who were excited to take their kids, young and grown, out to the ball game.
Adjective
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Pitman grew even more agitated.
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Players grew agitated having to wait, but James was sending a message to Irving and the rest of his teammates.
Adjective
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Of course, Zola was hyperactive in his own way.
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And while Every Single Muscle may not be a concept album, its focus on the human body is intense and consistent to support a hyperactive number of songs and styles packed together.
Cite this Entry
“Overactive.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/overactive. Accessed 3 Jul. 2026.
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