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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.

"This observation is particularly noteworthy, as it coincides with a time when many women report a significant decline in energy levels and the onset of persistent fatigue," adds Dr. Ermolaeva.

From Science Daily • Jun. 11, 2026

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

Many oil-market analysts at the onset of the U.S.-Iran war said the global economy would start to feel the pinch of a virtually shut Strait of Hormuz as early as May.

From MarketWatch • May 26, 2026

The professor recited facts in a dull, earthy voice: the average age of onset is twenty-five; there may be no symptoms before then.

From "Educated" by Tara Westover




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