Combustion (noun)

1. The process of burning, producing heat and light.
2. The act or process of burning a fuel, especially with oxygen in air, to produce heat or power.
3. A chemical reaction between a fuel and oxygen that produces heat and usually light.

Origin:

From latin combustio, from comburere ('to burn up').

Examples:

1. The combustion of fossil fuels is a major contributor to air pollution.
2. The internal combustion engine revolutionized transportation.
3. The combustion of wood produces carbon dioxide and water vapor.