1 trade, barter, switch, change, interchange, reciprocate, return, Colloq swap or swop:
We exchange gifts every Christmas.
2 trade, barter, change, traffic, commerce, dealing, truck, transfer, interchange, reciprocity, reciprocation, switch, quid pro quo, tit for tat, Colloq swap or swop:
An exchange of prisoners was negotiated. What can I do for you in exchange?
3 altercation, argument, quarrel, disagreement, unpleasantness:
We had a brief exchange, then he struck me.
4 market, stock market, Stock Exchange, securities exchange, the Market, the Board, the Big Board, the Exchange, the Bourse, Wall Street, US the Street:
The exchange reported little activity in anticipation of the finance minister's speech.