OVERACTIVE Synonyms: 48 Similar and Opposite Words

overactive

adjective

ˌō-vər-ˈak-tiv

Definition of overactive

as in heated

being in a state of increased activity or agitation the boy manages to panic himself by his own overactive imagination

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of overactive Thus, people who have overactive versions of PCSK9 have fewer LDL receptors and higher LDL levels in their blood. — Beth Mole, ArsTechnica, 28 May 2026 Sepsis is considered a life-threatening medical emergency that occurs when the body has an extreme, overactive response to an infection, causing the immune system to damage its own tissues and organs, according to the Centers for Disease Control and Prevention. — Steve Reed, Los Angeles Times, 23 May 2026 Studies show the drug works by affecting brain chemicals such as glutamate and dopamine to help calm the overactive signals in the brain linked to agitation. — Dr. Jennifer Miao, ABC News, 1 May 2026 Red or Dark Skin With an overactive thyroid, your circulation increases. — Brandi Jones, Health, 28 Apr. 2026 See All Example Sentences for overactive

Recent Examples of Synonyms for overactive

Adjective

Don’t miss a dip in the heated indoor pool or a moment of quiet in the peaceful private garden.

— Condé Nast, Condé Nast Traveler, 4 Aug. 2026
The battle between Sanford and GOAA became especially heated after the Sanford airfield applied to trademark its name and logo, succeeded, and GOAA filed an appeal.

— Martin E. Comas, The Orlando Sentinel, 3 Aug. 2026

Definition of heated

Adjective

One player Nakase is excited to work with is someone her team was prepared to face on Friday night – Dallas star guard Paige Bueckers.

— Marisa Ingemi, Mercury News, 8 Aug. 2026
This will also be its first year since 2024, when Latino Fest returned after a five-year break to excited crowds.

— Idaho Statesman, Idaho Statesman, 7 Aug. 2026

Definition of excited

Adjective

Finally, there was the matter of Pollak himself, whose hyperactive social posts could come across as cringe, leaving many, including some inside Coinbase, to see him as high on his own supply.

— Jeff John Roberts, Fortune, 20 July 2026
Your hyperactive dog catches the scent of a deer and, powered by his hunter's instinct, disappears in the forest.

— Tereza Pultarova, Space.com, 11 July 2026

Definition of hyperactive

Browse Nearby Words

overacting

overactive

overacts

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“Overactive.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/overactive. Accessed 9 Aug. 2026.

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Synonyms of overactive

adjective

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