Adiabatic processes do not maintain constant temperatures; instead, they involve changes in temperature due to heat transfer being absent. The definition of an adiabatic process indicates that it occurs without heat exchange with the surroundings. In reversible adiabatic processes, the temperature changes in a predictable manner, while irreversible adiabatic processes can lead to less predictable temperature changes. The distinction between these two types is crucial for understanding the behavior of gases under adiabatic conditions. Overall, temperature changes are inherent to adiabatic processes, depending on their reversible or irreversible nature.