overactive
Americanadjective
adjective
-
inordinately active
-
(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.
When these cells become overactive, they can contribute to the inflammatory processes associated with MASH.
From Science Daily ● Oct. 17, 2026
In Lowen’s overactive imagination, Hathaway plays a Hitchcockian femme fatale always wearing her signature color, red.
From Los Angeles Times ● Oct. 1, 2026
Relaxing travel activities may also help reduce chronic stress and calm an overactive immune response.
From Science Daily ● May 4, 2026
“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
My mother used to tell me that I had an overactive imagination; Tom said that, too.
From "The Girl on the Train" by Paula Hawkins
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
