An adiabatic process is a thermodynamic process in which no heat is exchanged between a system and its surroundings. This means that any change in the system's internal energy is solely due to work done on or by the system. Adiabatic processes can occur in gases, where rapid compression or expansion prevents heat transfer. In an adiabatic process, the temperature of a gas can change even though no heat is added or removed. For example, when a gas expands quickly, it cools down, while compressing a gas raises its temperature. These principles are important in various applications, including refrigeration and engine cycles.