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overactivity

American  
[oh-ver-ak-tiv-i-tee] / ˌoʊ vərˌækˈtɪv ɪ ti /

noun

  1. the state or quality of being 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.

NRF2 overactivity plays a major role in chemotherapy resistance in several solid tumors, including cancers of the liver, esophagus and head and neck.

From Science Daily • Nov. 17, 2025

Recent evidence suggests that overactivity of brain immune cells called microglia, which devour unfamiliar pathogens and dead brain tissue, may accelerate brain degeneration.

From Washington Post • Dec. 2, 2022

They’ve also come to recognize its unique profile of immune system overactivity and have identified effective treatments.

From Science Magazine • Mar. 18, 2021

Those symptoms are broadly inattention, overactivity and impulsivity.

From The Guardian • Aug. 7, 2018

Hyperthyroidism, or Graves' Disease, a condition in which there is overactivity of the thyroid gland and which is particularly prevalent among young women, is one of those diseases.

From The Nervous Housewife by Myerson, Abraham