An act of exchanging or trading.

A place for conducting trading.

A telephone exchange.

(telephony, US) The fourth through sixth digits of a ten-digit phone number (the first three before the introduction of area codes).

A conversation.

(chess) The noun "exchange" refers to the loss of one piece and the capture of another, particularly the loss of a minor piece and the capture of a more advantageous rook.

(biochemistry) The transfer of substances or elements like gas, amino-acids, ions etc. sometimes through a surface like a membrane.

(finance) The difference between the values of money in different places.

(law, England and Wales, Northern Ireland) Clipping of exchange of contracts.

(transitive) To trade or barter.

(transitive, figurative) To mutually direct at each other.

(transitive) To replace with, as a substitute.

(law, England and Wales, Northern Ireland) Clipping of exchange contracts.

(transitive) To recommend and get recommendations.