n. (Chem.) A form of the voltaic battery having large plates, used for producing rapid and powerful combustion. [ 1913 Webster ]
n. [ L. deflagratio: cf. F. déflagration. ] 1. A burning up; conflagration. “Innumerable deluges and deflagrations.” Bp. Pearson. [ 1913 Webster ]
2. (Chem.) The act or process of deflagrating. [ 1913 Webster ]