n. The act of carrying or conveying; specifically, the transference of heat or electricity through the change of position of the heated or electrified body: distinguished from conduction (which see).n. by liberation of the latent heat of evaporation which remains with the aqueous vapor contained in the air until it is liberated by condensation into cloud. In so far as the liberated heat remains in the cloud, it may be consumed in reëvaporating the cloudy particles or be lost by radiation; in so far as it is brought down to the earth with the rain or snow, it affects the local climate powerfully.