ETYM Old Eng. eschange, eschaunge, Old Fren. eschange, from eschangier, French échanger, to exchange; pref. ex- out + French changer. Related to Change, Excamb.
1. The act of exchanging one thing for another.
2. The act of giving something in return for something received.
3. Reciprocal transfer of equivalent sums of money especially the currencies of different countries; SYN. interchange.
4. A mutual expression of views (especially an unpleasant one).
5. A place for buying and selling; open only to members.
6. Chemical process in which one atom or ion or group changes places with another.
In computing, to move segments of data in and out of memory. For fast operation as much data as possible is required in main memory, but it is generally not possible to include all data at the same time. Swapping is the operation of writing and reading from the backup store, often a special space on the disc.
1. A balancing of factors all of which are not attainable at the same time off which governs personnel practices
2. A giving up of one thing in return for another; exchange