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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The 21-year-old was nervous and excited putting on the Lakers’ gold jersey Friday at Chase Center.
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Mauricio Umansky, Richards' estranged husband, is just as excited for the family's new addition.
Adjective
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People with heat stroke can feel confused, unable to speak properly and agitated.
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However, first base umpire Todd Tichenor tossed the agitated second baseman after Chisholm spiked his helmet toward home plate.
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 7 Jul. 2026.
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