n. The change of vapor into water, as in the formation of rain. [ 1913 Webster ]

n. [ L. evaporatio: cf. F. évaporation. ] 1. The process by which any substance is converted from a liquid state into, and carried off in, vapor; as, the evaporation of water, of ether, of camphor. [ 1913 Webster ]

2. The transformation of a portion of a fluid into vapor, in order to obtain the fixed matter contained in it in a state of greater consistence. [ 1913 Webster ]

3. That which is evaporated; vapor. [ 1913 Webster ]

4. (Steam Engine) See Vaporization. [ 1913 Webster ]

n. The concentration of a colloidal solution whose colloid will not pass through a semipermeable membrane; the solution is placed in a bag of the membrane and the solvent is evaporated off. [ WordNet 1.5 ]

n. [ Cf. F. vaporation, L. vaporatio. ] The act or process of converting into vapor, or of passing off in vapor; evaporation. [ R. ] [ 1913 Webster ]