what does plague mean
Full Definition of PLAGUE. 1. a: a disastrous evil or affliction: calamity. 2. a: an epidemic disease causing a high rate of mortality: pestilence b: a virulent contagious febrile disease that is caused by a bacterium (Yersinia pestis) and that occurs in bubonic, pneumonic, and septicemic forms âcalled also black death.3.ull Definition of PLAGUE. 1. a: a disastrous evil or affliction: calamity. 2. a: an epidemic disease causing a high rate of mortality: pestilence b: a virulent contagious febrile disease that is caused by a bacterium (Yersinia pestis) and that occurs in bubonic, pneumonic, and septicemic forms âcalled also black death. 3.