CONDENSATION, adjective [Latin See Condense.] The act of making more dense or compact; or the act of causing the parts that compose a body to approach or unite more closely, either by mechanical pressure, or by a natural process; the state of being condensed. Dew and clouds are supposed to be formed by the condensation of vapor. It is opposed to rarefaction and expansion. condensation is applicable to any compressible matter; and from condensation proceeds increased hardness, solidity, and weight.