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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.

“Early onset breast cancer” — diagnosed before age 50 — “is going up the fastest among Asian Americans,” Gomez said.

From Los Angeles Times • Jun. 6, 2026

Next month's forecast is likely to be more accurate as to the onset of El Nino and its strength.

From Barron's • Jun. 2, 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

Their onset was fierce and sudden, and the Orcs gave way before them.

From "The Two Towers" by J. R. R. Tolkien




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