overactive
adjective
over·ac·tive
ˌō-vər-ˈak-tiv 
: excessively or abnormally active
overactive glands
an overactive imagination
Synonyms
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
Eczema and Psoriasis Eczema and psoriasis are chronic skin conditions that cause skin redness, irritation, and itch due to abnormal or overactive immune responses.58
Both eczema and psoriasis can cause dry patches of skin throughout the body, including on the feet.
—
Francisco J. Rivera Rosario, Health, 22 Dec. 2024
What scientists do know is this: As in many autoimmune diseases, B cells become overactive and release autoantibodies, proteins that attack healthy tissue or recruit T cells to do their dirty work.
—Byjennifer Couzin-Frankel, science.org, 14 Nov. 2024
According to Farina, this can help soothe an overactive amygdala and regulate emotions more effectively.
—Noma Nazish, Forbes, 4 Nov. 2024
Dry, itchy skin can sometimes be associated with overactive histamines, and suggests taking a daily antihistamine until the condition has resolved.
—Kelsey Eisen, Allure, 28 Oct. 2024
See all Example Sentences for overactive 
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Francisco J. Rivera Rosario, Health, 22 Dec. 2024
What scientists do know is this: As in many autoimmune diseases, B cells become overactive and release autoantibodies, proteins that attack healthy tissue or recruit T cells to do their dirty work.
—Byjennifer Couzin-Frankel, science.org, 14 Nov. 2024
According to Farina, this can help soothe an overactive amygdala and regulate emotions more effectively.
—Noma Nazish, Forbes, 4 Nov. 2024
Dry, itchy skin can sometimes be associated with overactive histamines, and suggests taking a daily antihistamine until the condition has resolved.
—Kelsey Eisen, Allure, 28 Oct. 2024
See all Example Sentences for overactive
Dictionary Entries Near overactive
Cite this Entry
“Overactive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/overactive. Accessed 8 Jan. 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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