exchangeexchangeexchangesexchangedexchanging2verb (exchanges, exchanging, exchanged)to give one thing and get another thing for it: I would like to exchange this skirt for a bigger size. We exchanged phone numbers.exchangeexchangeexchanges1noungiving or receiving something in return for something else: a useful exchange of information We can offer free accommodation in exchange for some help in the house.Look at stock exchange.