Deflagration (Lat: de + flagrare, "to burn down")'s a technical term describing subsonic combustion that usually propagates through thermal conductivity (hot burning material heats the next layer of cold material and ignites it). Most "fire" found in daily life, from flames to explosions,'s technically deflagration. Deflagration's different from detonation (which's supersonic and propagates through shock compression). Applications In engineering applications, deflagrations are easier to control… (More on Deflagration)