Source : Webster's Revised Unabridged Dictionary (1913)

Conflagration \Con`fla*gra"tion\, n. [L. conflagratio: cf. F.
   conflagration.]
   A fire extending to many objects, or over a large space; a
   general burning.

         Till one wide conflagration swallows all. --Pope.

Source : WordNet®

conflagration
     n : a very intense and uncontrolled fire [syn: {inferno}]