3
: characterized by very widespread growth or extent : of, relating to, or constituting an epidemic
— ep·i·dem·i·cal\-ˈde-mi-kəl\adjective
— ep·i·dem·i·cal·ly\-ˈde-mi-k(ə-)lē\adverb
— ep·i·de·mic·i·ty\-də-ˈmi-sə-tē\noun