Main entry: prevalence
Definition: the quality of prevailing generally; being widespread
Usage: he was surprised by the prevalence of optimism about the future
Main entry: preponderance, prevalence
Definition: a superiority in numbers or amount
Usage: a preponderance of evidence against the defendant
Main entry: prevalence
Definition: (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