̷ ̷ˌ ̷ ̷ ̷ ̷ˈrāshən noun
( -s )
Etymology: Middle English evaporacioun, from Middle French or Latin; Middle French evaporation, from Latin evaporation-, evaporatio, from evaporatus + -ion-, -io -ion
1.
a. : the change by which any substance is converted from a liquid state into and carried off in vapor ; specifically : the conversion of a liquid into vapor in order to remove it wholly or partly from a liquid of higher boiling point or from solids dissolved in or mixed with it — compare distillation 1, sublimation
b. : the process by which molecules of a heated metal or metallic compound are released to be subsequently deposited as a film on neighboring cooler surfaces : sublimation
c. : the expulsion of particles (as of neutrons from a nucleus or electrons from a thermionic filament)
2. : the process of evaporating or concentrating by conversion of a part into vapor
evaporation of syrup
3. archaic : the product or result of evaporating : vapor formed or a reaction effected by evaporating
4.
a. : the process of passing away or off without leaving a trace : disappearance , dissipation
evaporation of the fortune took less time … and in the early thirties he was on his uppers — R.H.Rovere
the gradual evaporation of humanitarian and democratic spirit — Carl Landauer
b. : the process of passing into a weaker, less substantial, or inferior state or form : weakening, decline
a danger of evaporation into a vague … mysticism — P.E.More