The exchange of currency from one country for currency from another country. / Foreign currency.

(economics, finance) The rate at which one currency can be exchanged for another, usually expressed as the value of the one in terms of the other.

plural of exchange student

A student who is participating in a student exchange scheme.

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

An obsolescent design of telephone exchange that uses Strowger switches as the call routing elements.

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

(chemistry) A reaction in which one or more atoms in a molecule are exchanged for ones of a different isotope of the same element

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

(Internet) A link exchange scheme where web sites display each other's banners.