(dated, UK) An employment agency, a job centre

(rare, archaic, idiomatic, euphemistic) To engage in sexual intercourse.

(literally, of two parties) To make a mutual promise. / To get married.

A medium of exchange.

An intermediary used in trade to avoid the inconveniences of a pure barter system, such as money.

(banking) A document demanding payment from another party, especially used in international trade.

(Internet) A scheme of reciprocal linking whereby two or more websites link to one another to increase traffic.

(inorganic chemistry) The normal form of ion exchange in which cations such as those of calcium are removed from solution

The Columbian Exchange.

(history) The widespread transfer of animals, plants, culture, human populations, communicable diseases, technology and ideas between the American and Afro-Eurasian hemispheres in the 15th and 16th centuries, related to European colonization and trade after Christopher Columbus' 1492 voyage.