Longman Dictionary of Contemporary English homepage

exchange

2 verb
     
exchange2 [transitive]
1
a) to give someone something and receive the same kind of thing from them at the same time:
We exchange gifts at Christmas.
At the end of the game, players traditionally exchange shirts with each other.
We exchanged phone numbers.
b) to give someone something and receive something different from them [= change]
exchange something for something
Where can I exchange my dollars for pounds?
2 to replace one thing with another [= swap]
exchange something for something
He exchanged the black jacket for a blue one.
3

exchange words/looks etc (with somebody)

if two people exchange words, looks etc, they talk to each other, look at each other etc:
Until this evening I had never so much as exchanged a word with him.
The two women exchanged glances and laughed.
I went over and exchanged greetings with everyone.
4

exchange blows (with somebody)

if two people exchange blows, they hit each other
5

exchange information/ideas etc

to discuss something or share information, ideas etc:
It's a place where people can chat and exchange ideas.
6

exchange contracts

especially British EnglishBBT to complete the final stage of buying a house by signing a contract with the person you are buying it from
exchangeable adjective

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