1. noun /pleɪɡ/
a) (used absolutely, usually capitalized: The Pest) The pestilent disease "Plague", caused by the virulent bacterium Yersinia pestis and mostly known by its variant form bubonic plague.
Ten Biblical plagues over Egypt, ranging from locusts to the death of the crown prince, finally forced Pharaoh to let Mosess people go
Rascal Bart is an utter plague, his pranks never cease until hes put over the knee
2. verb /pleɪɡ/
Wikis are often plagued by vandalism
b) To afflict with a disease or other calamity.
Natural catastrophies plagued the colonists till they abandoned the pestilent marshland
Wikipedia foundation.