Deflagrating refers to a type of combustion that occurs at a speed slower than the speed of sound. This process typically involves the rapid oxidation of a material, resulting in heat and light. Common examples of deflagrating materials include certain types of explosives and combustible substances, such as gunpowder. In deflagration, the reaction produces a shock wave that travels through the material, causing it to burn and release energy. This is different from detonation, where the reaction occurs at supersonic speeds. Understanding deflagration is important in fields like pyrotechnics and safety engineering.