preexchange

== English == === Etymology === From pre- +‎ exchange. === Adjective === preexchange (not comparable) Occurring before an exchange. === Noun === preexchange (plural preexchanges) An exchange that takes place beforehand. An interaction that introduces and leads to but is not yet a true exchange. === Verb === preexchange (third-person singular simple present preexchanges, present participle preexchanging, simple past and past participle preexchanged) To exchange beforehand.