(especially of medicine) of disease or anything resembling a disease; attacking or affecting many individuals in a community or a population simultaneously

of or relating to a disease (or anything resembling a disease) constantly present to greater or lesser extent in a particular locality

(of plants) epidemic among plants of a single kind especially over a wide area

(of animals) epidemic among animals of a single kind within a particular region

epidemic over a wide geographical area

likely to spread and cause an epidemic disease

of a disease that is constantly present in an animal community but only occurs in a small number of cases