a) An infectious and fatal disease among cattle. A murrain on you, may you be afflicted with a pestilent disease.HOMEb)Heb. deber, "destruction," a "great mortality", the fifth plague that fell upon the Egyptians (Ex. 9:3). It was some distemper that resulted in the sudden and widespread death of the cattle. It was confined to the cattle of the Egyptians that were in the field (9:6).