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
In contrast, pathogenic inflammation can stem from overactive immune cells releasing inflammatory signals after a prolonged response to a bacteria or virus.
—
Allison Aubrey, NPR, 19 Jan. 2026
Why Proteinuria Occurs With C3G Complement 3 glomerulopathy is caused when the complement system—a part of the immune system that fights infection—becomes overactive.
—Md Published, Verywell Health, 12 Jan. 2026
The study found that in cirrhosis, a change in gene regulation, specifically the removal of chemical marks from the PAF-R gene, causes the gene to become overactive.
—Pranjal Malewar, New Atlas, 11 Jan. 2026
This reduces the overactive immune response that causes psoriasis.
—Ed Silverman, STAT, 6 Jan. 2026
See All Example Sentences for overactive
Allison Aubrey, NPR, 19 Jan. 2026
Why Proteinuria Occurs With C3G Complement 3 glomerulopathy is caused when the complement system—a part of the immune system that fights infection—becomes overactive.
—Md Published, Verywell Health, 12 Jan. 2026
The study found that in cirrhosis, a change in gene regulation, specifically the removal of chemical marks from the PAF-R gene, causes the gene to become overactive.
—Pranjal Malewar, New Atlas, 11 Jan. 2026
This reduces the overactive immune response that causes psoriasis.
—Ed Silverman, STAT, 6 Jan. 2026
See All Example Sentences for overactive
Recent Examples of Synonyms for overactive
Adjective
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The Luxe Package also comes standard, bringing along comforts like heated floors, water filtration, continuous hot water and a HEPA air filter.—
New Atlas,
New Atlas,
6 Feb. 2026
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There’s also a heated outdoor pool, as well as access to the fitness center.—
Jessica Chapel,
Condé Nast Traveler,
6 Feb. 2026
Adjective
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So, there are all sorts of fun details and influences here and everybody at Eintracht Frankfurt sounds incredibly excited about where the appointment may lead.—
Sebastian Stafford-Bloor,
New York Times,
9 Feb. 2026
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Benito Antonio Martínez Ocasio — during the halftime show, to a family excited to witness their son play in one of the biggest games of his career, here's a quick breakdown of those moments.—
Noe Padilla,
USA Today,
9 Feb. 2026
Adjective
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According to court documents, Shadbar became agitated and threatened to kill the family, using a racist slur in his threats, presumably directed at Robertson’s sons who are Black.—
Michelle Mullins,
Chicago Tribune,
6 Feb. 2026
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To their credit, some gun-rights supporters did get agitated over this kerfuffle.—
Steven Greenhut,
Oc Register,
6 Feb. 2026
Adjective
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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
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This hyperactive rhythm section allowed Belew and Fripp to expand the definition of lead guitarists.—
Sam Sodomsky,
Pitchfork,
11 Jan. 2026
Cite this Entry
“Overactive.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/overactive. Accessed 11 Feb. 2026.
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