Adiabatic cools by decompression.

An adiabatic process in the opposite of a diabatic process. The adiabatic process occurs without the exchange of heat with its environment. A diabatic process exchanges heat with the environment.

An adiabatic process is a thermodynamic process, there is no gain or loss of heat.

An adiabatic wall can be defined as a wall through which no energy transfer takes place.

When environmental lapse rate is

more than dry adiabatic lapse rate,

the atmosphere is said to be in