overactive
adjective
over·ac·tive
ˌō-vər-ˈak-tiv 
: excessively or abnormally active
overactive glands
an overactive imagination
Examples of overactive in a Sentence
She has an overactive bladder.
His crazy ideas are products of an overactive imagination.
Recent Examples on the Web
Your overactive immune response can lead to inflammation and congestion, among other symptoms.
—
Lindsay Curtis, Health, 25 Apr. 2025
So, Gemini can relate to the stress and lack of rest that Victoria goes through since the twin star has an overactive mind.
—Lisa Stardust, People.com, 21 Mar. 2025
For chronic pain sufferers like me, the pain pathways in our brains often become overactive.
—Peter Ubel, Forbes, 25 Feb. 2025
Systemic medications, which impact the whole body and can be more effective than other treatments in tougher eczema cases, work internally to calm the overactive immune response that often drives the condition.
—Lynya Floyd, Allure, 23 May 2025
See All Example Sentences for overactive
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Lindsay Curtis, Health, 25 Apr. 2025
So, Gemini can relate to the stress and lack of rest that Victoria goes through since the twin star has an overactive mind.
—Lisa Stardust, People.com, 21 Mar. 2025
For chronic pain sufferers like me, the pain pathways in our brains often become overactive.
—Peter Ubel, Forbes, 25 Feb. 2025
Systemic medications, which impact the whole body and can be more effective than other treatments in tougher eczema cases, work internally to calm the overactive immune response that often drives the condition.
—Lynya Floyd, Allure, 23 May 2025
See All Example Sentences for overactive
Cite this Entry
“Overactive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/overactive. Accessed 10 Jun. 2025.
Copy CitationKids Definition
overactive
adjective
over·ac·tive
ˌō-və-ˈrak-tiv
: very active and especially abnormally so
an overactive thyroid
Medical Definition
overactive
adjective
over·ac·tive
ˌō-və-ˈrak-tiv
: excessively or abnormally active
an overactive mind
overactive glands
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