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
How Allergies Can Lead to Dizziness Allergies are caused by your immune system having an overactive response to an allergen.
—
Lindsay Curtis, Health, 25 Apr. 2025
This was different from the oohs and ahhs at Marvel products, whose viewers merely go along with standard overactive, violent manipulation.
—Armond White, National Review, 16 Apr. 2025
Glimmers can help counteract an overactive stress response by training the brain to recognize safety.
—Mark Travers, Forbes, 14 Mar. 2025
Research has consistently linked higher stress and anxiety levels with overactive bladder symptoms.
—Dr. Jamin Brahmbhatt, CNN Money, 16 Apr. 2025
See All Example Sentences for overactive
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Lindsay Curtis, Health, 25 Apr. 2025
This was different from the oohs and ahhs at Marvel products, whose viewers merely go along with standard overactive, violent manipulation.
—Armond White, National Review, 16 Apr. 2025
Glimmers can help counteract an overactive stress response by training the brain to recognize safety.
—Mark Travers, Forbes, 14 Mar. 2025
Research has consistently linked higher stress and anxiety levels with overactive bladder symptoms.
—Dr. Jamin Brahmbhatt, CNN Money, 16 Apr. 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 5 May. 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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