the quality of being changeable; having a marked tendency to change

the quality of being incapable of exchange or interchange

capable of being exchanged for or replaced by something of equal value

(geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry

the quality of being transferable or exchangeable

the quality of being exchangeable (especially the ability to convert a currency into gold or other currencies without restriction)

the quality of not being exchangeable

exchangeability by virtue of being replaceable