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Definitions

overactive

[oh-ver-ak-tiv] / ˌoʊ vərˈæk tɪv /


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

"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

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

Researchers are probing the pill’s efficacy in patients with Type 2 inflammatory diseases, which are triggered by an overactive immune response.

From Barron's • Dec. 8, 2025

It might be my overactive imagination, but Ren’s smile seems tighter than everyone else’s, his happiness for me strained.

From "Warcross" by Marie Lu




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