Exchange meaning : An act of exchanging or trading. A place for conducting trading. A telephone exchange. The fourth through sixth digits of a ten-digit phone number (the first three before the introduction of area codes). A conversation. The loss of one piece and associated capture of another The thing given or received in return; especially, a publication exchanged for another. The transfer of substances or elements like gas, amino-acids, ions etc. sometimes through a surface like a membrane. The difference between the values of money in different places.