Edited sentence: Before you remove this add a valid reference to thermodynamics otherwise remove the definition of thermodynamics all together.If this is fact then prove it wrong.Missing reference.Term use is misleading where there is already defined terms such as boiling points and equilibrium.The misuse may come from the well define use in weather.The term may be used incorrectly by mass social acceptance without questioning its valid use.This has as spread to other areas that lead to confusion in chemistry not just steam.This is fact and not opinion since there is no valid reference only undocumented acceptance.Which states that air is saturated at 100% humidity