When environmental lapse rate is

more than dry adiabatic lapse rate,

the atmosphere is said to be in

Lapse rate is the rate at which air temperature decreases with existing altitude

environmental lapse rate involves the actual temperature of the atmosphere at various heights.

adiabatic cooling is the cooling of air caused when air is not allowed to expand or compress.

The rate at which adiabatic cooling occurs with increasing altitude for wet air (air containing clouds or other visible forms of moisture) is called the wet adiabatic lapse rate, the moist adiabatic lapse rate, or the saturated adiabatic lapse rate.