overactive
Americanadjective
adjective
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inordinately active
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(of the thyroid or adrenal gland, nervous system, etc) functioning at too high a capacity
Other Word Forms
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 most fiction, it is a composite, an amalgam of personal experience, research and my fertile, overactive imagination,” Raicek said.
From The Wall Street Journal ● Apr. 16, 2026
Koy, the son of a white father and Filipina mother, saw comedy as a way to channel an overactive personality and need to make people laugh into a career.
From Los Angeles Times ● Mar. 5, 2026
"I'm a fierce perfectionist and there is an overactive, hugely self-critical voice in my head - my whole life is an exercise in trying to shake that," he says.
From BBC ● Dec. 31, 2025
The company launched a new product for overactive bladder called Altaviva.
From Barron's ● Nov. 18, 2025
It occurs when an overactive immune system begins attacking the cells that create pigment, or color, in the skin.
From "How to Disappear Completely" by Ali Standish
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.
