over·​ac·​tive | \ ˌō-vər-ˈak-tiv How to pronounce overactive (audio) \

Definition of overactive

: excessively or abnormally active overactive glands an overactive imagination

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Other Words from overactive

overactivity \ ˌō-​vər-​ak-​ˈti-​və-​tē How to pronounce overactivity (audio) \ noun

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 In 2016, for example, doctors who received payments related to Myrbetriq, which treats overactive bladder, wrote 64% more prescriptions for the drug than those who did not. Charles Ornstein, ProPublica, "We’ve Been Tracking Pharma Payments to Doctors For Nearly A Decade. We Just Made A Big Breakthrough.," 20 Dec. 2012 She was diagnosed with hypothyroidism (an overactive thyroid) a year later. Christina Oehler, Health.com, "This Woman Used TikTok to Document Her Weight Loss Journey, and Her Results Will Seriously Inspire You," 10 Dec. 2019 Researchers have been questioning whether or not marijuana can relieve this overactive fear system and studies seem to point to yes. Brea Mosley, chicagotribune.com, "One way marijuana helps veterans and others with PTSD," 11 Nov. 2019 The disorder stems from overactive immune cells that cause inflammation and can result in debilitating symptoms, including difficulty walking and seeing. BostonGlobe.com, "“It’s important for people with MS to have treatments that are both efficacious and tolerable to help manage their disease,” said Bruce Bebo, executive vice president of research for the nonprofit National Multiple Sclerosis Society.," 31 Oct. 2019 In psoriasis, these overactive cells can lead to elevated levels of tumor necrosis factor, which is secreted via the inflammatory process. Sun Pharmaceuticals, WIRED, "IL-23: The Master Regulator Behind Plaque Psoriasis," 30 Oct. 2019 The disorder stems from overactive immune cells that cause inflammation, and can result in debilitating symptoms, including difficulty walking and seeing. Jonathan Saltzman — Boston Globe, STAT, "New MS drug from Biogen and Alkermes wins approval," 30 Oct. 2019 By tamping down overactive immune systems, the drugs can lead to substantial improvement, even remission. John Fauber, Milwaukee Journal Sentinel, "A drug's most dangerous side effects often aren't discovered until it's on the market," 18 July 2019 Nearly 40,000 fires have been incinerating Brazil’s Amazon rainforest, the latest outbreak in an overactive fire season that has charred 1,330 square miles of the rainforest this year. Fox News, "Leonardo DiCaprio-backed fund pledges $5M in aid for Amazon wildfires," 25 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'overactive.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of overactive

1647, in the meaning defined above

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Time Traveler for overactive

Time Traveler

The first known use of overactive was in 1647

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Statistics for overactive

Last Updated

28 Dec 2019

Cite this Entry

“Overactive.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/overactive. Accessed 18 January 2020.

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More Definitions for overactive


How to pronounce overactive (audio)

English Language Learners Definition of overactive

: too active especially in a way that produces a bad result


over·​ac·​tive | \ ˌō-və-ˈrak-tiv How to pronounce overactive (audio) \

Medical Definition of overactive

: excessively or abnormally active an overactive mind overactive glands

Other Words from overactive

overactivity \ -​ˌrak-​ˈtiv-​ət-​ē How to pronounce overactivity (audio) \ noun, plural overactivities

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More from Merriam-Webster on overactive

Thesaurus: All synonyms and antonyms for overactive

Rhyming Dictionary: Words that rhyme with overactive

Spanish Central: Translation of overactive

Nglish: Translation of overactive for Spanish Speakers

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