1. \Mur"rain\, n. [OE. moreine, OF. morine, fr. OF. morir,
   murir, 8die, L. mori, moriri.] (Far.)
   An infectious and fatal disease among cattle. --Bacon.
   
   {A murrain on you}, may you be afflicted with a pestilent
      disease. --Shak.
   
   

2. \Mur"rain\, a.
   Having, or afflicted with, murrain.
   
   

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).