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
Nail Psoriasis Psoriasis is a chronic autoimmune condition that develops when an overactive immune system causes skin cells to grow too quickly, leading to itchy plaques of thick, burning, or irritated skin.
—
Lindsay Curtis, Health, 21 Oct. 2024
Even the balm of the New Hampshire wilderness has not slowed Rohrer’s overactive motor.
—Joseph Bien-Kahn, WIRED, 19 Sep. 2024
The condition causes the thyroid gland to produce too much thyroid hormones, which results in hyperthyroidism or an overactive thyroid.
—Armon Sadler, VIBE.com, 7 Aug. 2024
The pressure of having too much milk build up in the breasts can also cause an overactive letdown reflex and a fast flow of breast milk out of your breasts.
—Donna Murray, Rn, Parents, 30 July 2024
See all Example Sentences for overactive 
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Lindsay Curtis, Health, 21 Oct. 2024
Even the balm of the New Hampshire wilderness has not slowed Rohrer’s overactive motor.
—Joseph Bien-Kahn, WIRED, 19 Sep. 2024
The condition causes the thyroid gland to produce too much thyroid hormones, which results in hyperthyroidism or an overactive thyroid.
—Armon Sadler, VIBE.com, 7 Aug. 2024
The pressure of having too much milk build up in the breasts can also cause an overactive letdown reflex and a fast flow of breast milk out of your breasts.
—Donna Murray, Rn, Parents, 30 July 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 Nov. 2024.
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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