overactive
Americanadjective
adjective
-
inordinately active
-
(of the thyroid or adrenal gland, nervous system, etc) functioning at too high a capacity
Other Word Forms
- overactiveness noun
- overactivity noun
Etymology
Origin of overactive
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
As the animals reached adulthood, this disruption led to an overactive immune response and chronic inflammation, significantly increasing the risk of inflammatory gut diseases and obesity.
From Science Daily • Dec. 26, 2025
Axonics makes an implantable device that treats bowel and bladder conditions, such as overactive bladder.
From Barron's • Oct. 30, 2025
“I have a prescription for an overactive bladder.”
From The Wall Street Journal • Oct. 17, 2025
Instead, he said that the unusual incident may have been due to the bee colony becoming too large for its beehive and becoming "overactive" when the beekeeper handled it.
From BBC • Jul. 8, 2025
"And why were you wasting precious time listening to an overaged delivery boy with an overactive imagination when you should have been studying."
From "The Westing Game" by Ellen Raskin
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
