Deflagration is a type of combustion that occurs at a relatively low speed, typically less than the speed of sound in the surrounding medium. This process involves the rapid oxidation of a fuel, producing heat and light, but it does not create a shock wave. Common examples of deflagration include the burning of wood or gasoline, where the flames spread through the material at a controlled rate. In contrast to detonation, which occurs at supersonic speeds and produces a shock wave, deflagration is characterized by its slower reaction. This makes it a safer form of combustion, often used in applications like fireworks and certain types of engines, where controlled burning is essential for efficiency and safety.