incidence
noun
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The words incident, incidence, and instance may seem similar (and, in fact, incident and incidence are closely related), but they are applied in different ways. In current use, incidence usually means "rate of occurrence" and is often qualified in some way ("a high incidence of bear sightings"). Incident usually refers to a particular event, often something unusual or unpleasant ("many such incidents go unreported"). Instance suggests a particular occurrence that is offered as an example ("another instance of a simple change bringing real improvement"); it can also be synonymous with case ("many instances/cases in which the wrong form was submitted"). The plural incidences sometimes occurs in such contexts as "several recent incidences of bear sightings," but this use is often criticized as incorrect.
Examples of incidence in a Sentence
New Atlas, 27 Oct. 2025
As China’s economy has grown, so too has its incidence of adultery.
—Sheri Linden, HollywoodReporter, 23 Oct. 2025
Wealthier white communities have a high incidence of the respiratory condition, too — eight or 10 of every 100 residents, according to the CDC.
—Joe Marusak, Charlotte Observer, 23 Oct. 2025
Mokdad co-authored a global survey that revealed that the tiny nation on the Mediterranean is experiencing the fastest increase in cancer incidence and mortality anywhere in the world.
—Ari Daniel, NPR, 22 Oct. 2025
See All Example Sentences for incidence
Cite this Entry
“Incidence.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/incidence. Accessed 31 Oct. 2025.
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