prevalence
Nouns
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(n) the quality of prevailing generally; being widespread
- he was surprised by the prevalence of optimism about the future
- (n) (epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population
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(n) a superiority in numbers or amount
- a preponderance of evidence against the defendant