plague
Word family
- plaguedadjectiveC1
Synonym discussion
Sense: noun/1
Plague is stronger and more historical than epidemic, and it often brings to mind the Black Death or another extremely deadly disease. Epidemic is the neutral public-health word for a disease spreading unusually widely in one region. Pandemic is wider still, used when the spread reaches many countries or continents. Outbreak is the broadest and often the smallest-scale word: an outbreak can begin in one school, hospital, or town. Pestilence is literary or old-fashioned and sounds biblical or historical. Say 'the village feared plague' when you mean the historic deadly disease, 'a flu epidemic' for medical reporting, and 'an outbreak of food poisoning' for a local event.
Etymology
Plague entered English from Old French plague, which came from Latin plaga, meaning a blow, wound, or strike. In medieval use the word moved from the broader idea of a heavy affliction to the more specific sense of a deadly epidemic disease. That older idea of severe trouble still helps explain modern uses such as being plagued by doubt or a plague of rats.