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 is a much faster and more violent reaction, deflagration is characterized by its gradual energy release. This makes it safer in many applications, such as in certain types of fireworks or in the controlled burning of fuels in engines, where a steady release of energy is desired.