Definition of PREVALENCE

noun : PREVALENCE

Source: WordNet 3.1

  • 1. (

    ) the quality of prevailing generally; being widespread; "he was surprised by the prevalence of optimism about the future" ;

  • 2. (

    ) (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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