meaning of deflagrate
1. To burn with a sudden and sparkling combustion, as niter; also, to snap and crackle with slight explosions when heated, as salt.
2. 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.
3. burn with great heat and intense light; "the powder
">deflagrated"