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Definitions

onset

[on-set, awn-] / ˈɒnˌsɛt, ˈɔn- /


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.

The onset of dementia in Árni spurs his grandson to consider what’s lost when the markers of memory depart.

From Los Angeles Times • Jun. 5, 2026

Mexico reported 1,717 active cases as of early May, while Panama’s caseload has grown so severe since its 2023 onset that officials have abandoned individual case tracking.

From Barron's • Jun. 4, 2026

It happened after the 1970s oil shock, then again much later as the market bounced back from the 2008 financial crisis and after the onset of the COVID-19 pandemic.

From MarketWatch • Jun. 2, 2026

The study found that a one year course of the biologic drug abatacept significantly delayed the onset of rheumatoid arthritis, with benefits continuing long after treatment ended.

From Science Daily • Jun. 1, 2026

Let us now summarize how variations in these three factors—time of onset of food production, barriers to diffusion, and human population size—led straightforwardly to the observed intercontinental differences in the development of technology.

From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond




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