\Def"la*grate\, v. i. [imp. & p. p. {Deflagrated}; p.
pr. & vb. n. {Deflagrating}.] [L. deflagratus, p. p. of
deflagrare to burn up; de- + flagrare to flame, burn.]
(Chem.)
To burn with a sudden and sparkling combustion, as niter;
also, to snap and crackle with slight explosions when heated,
as salt.

\Def"la*grate\, v. t. (Chem.)
To cause to burn with sudden and sparkling combustion, as by
the action of intense heat; to burn or vaporize suddenly; as,
to deflagrate refractory metals in the oxyhydrogen flame.