exchange

1 a giving or taking of one thing of value in return for another exchanges of commemorative pins are common among Olympic athletes Synonyms back-and-forth, barter, commutation, dicker, quid pro quo, swap, trade, trade-off, truck Related Words replacement, substitution; reciprocation, recompense, requital; bargain, deal, horse trade, negotiation, transaction; bargaining, dealing, dickering, haggling, horse trading; logrolling

2 talking or a talk between two or more people we had a brief exchange with the pastor as we passed him on the way out of church Synonyms chat, colloquy, converse, dialogue (also dialog), discourse, discussion, conversationRelated Words banter, chaff, cross fire, give-and-take, persiflage, raillery, repartee; conference, parley, powwow; babble, chatter, chin-wag [slang], chitchat, confabulation, gabfest, gossip, natter [chiefly British], palaver, prate, prattle, rap, small talk, table talk; round-robin, roundtable, symposium; debate, deliberation