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
Treg cells also control internal revolt in the form of an overactive immune response by other immune cells that can trigger allergies and autoimmune diseases such as arthritis, lupus and multiple sclerosis – diseases that develop when Treg cells are defective in either number, function or both.
—
Mitzi Nagarkatti, The Conversation, 10 Oct. 2025
An overactive immune system also contributes.
—Daryl Austin, USA Today, 7 Oct. 2025
The hormone, hepcidin, can be slightly overactive when your iron levels go up.
—Abby Norman, Verywell Health, 6 Oct. 2025
Since blemishes are closely tied to overactive oil glands, using a mask with these clays helps reduce one of the main triggers of acne.
—Christa Joanna Lee, Allure, 30 Sep. 2025
See All Example Sentences for overactive
Mitzi Nagarkatti, The Conversation, 10 Oct. 2025
An overactive immune system also contributes.
—Daryl Austin, USA Today, 7 Oct. 2025
The hormone, hepcidin, can be slightly overactive when your iron levels go up.
—Abby Norman, Verywell Health, 6 Oct. 2025
Since blemishes are closely tied to overactive oil glands, using a mask with these clays helps reduce one of the main triggers of acne.
—Christa Joanna Lee, Allure, 30 Sep. 2025
See All Example Sentences for overactive
Recent Examples of Synonyms for overactive
Adjective
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The hotel is a half-mile from the Zion Canyon Visitor Center and comes with heated pools and hot tubs, as well as a fitness center and airport shuttle.—
Stephanie Vermillion,
Travel + Leisure,
9 Nov. 2025
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Carlson’s treatment of Fuentes on the show was in direct contrast to the pundit’s heated interview with Cruz in June.—
David Zimmermann,
The Washington Examiner,
8 Nov. 2025
Adjective
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No pretending to be too cool to be excited, just vibing and living in the moment.—
Stephanie Sengwe,
PEOPLE,
5 Nov. 2025
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Now Lomax is excited for future opportunities to work with other brands.—
Kansas City Star,
Kansas City Star,
5 Nov. 2025
Adjective
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On a tech podcast released last weekend, Altman appeared to grow agitated when host Brad Gerstner asked how OpenAI would fund the commitments given current revenues.—
Steve Kopack,
NBC news,
6 Nov. 2025
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Lairmore, one of only two witnesses called, testified that officers perceived a potential threat from an agitated Dunn.—
Andrew Goudsward,
USA Today,
6 Nov. 2025
Adjective
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Four of those were in the hyperactive 2005 hurricane season.—
Dinah Voyles Pulver,
USA Today,
2 Nov. 2025
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As estrogen decreases during menopause, nerves in the hypothalamus — an almond-size region deep inside the brain whose functions include helping regulate the body’s thermostat — become hyperactive and produce an overabundance of chemical signals called neurokinins.—
Jacqueline Howard,
CNN Money,
24 Oct. 2025
Cite this Entry
“Overactive.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/overactive. Accessed 19 Nov. 2025.
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