Etymology From Middle English eschaunge, borrowed from Anglo-Norman eschaunge, from Old French eschange (whence modern French échange), from the verb eschanger, from Vulgar Latin *excambiāre (from Latin ex with Late Latin cambiō). Spelling later changed on the basis of ex-, with pronunciation following. By surface analysis, ex- + change.
The 555 exchange is reserved for use by the phone company, which is why it's often used in films.
NPA-NXX-1234 is standard format, where NPA is the area code and NXX is the exchange.
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A conversation.
After a lengthy exchange with the manager, we were no wiser.
'Why bother with the daily grind when you can go to Mosul, get paid $400 a month, get a wife – and live an Islamic way,' went an exchange between two men overheard by a fellow passenger in a taxi. Rumour has it that a woman whose husband died fighting with Isis now receives a generous widow's pension from jihadi coffers.2014 November 27, Ian Black, “Courts kept busy as Jordan works to crush support for Isis”, in The Guardian:
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The monarch and the prime minister meet weekly, currently on Wednesdays, to discuss matters of state. There is no one else in the room, and many former prime ministers have spoken about how much they have enjoyed the weekly exchanges.2022 October 25, Karla Adam, “King Charles III plays role his mother did in U.K. power transition”, in The Washington Post:
Obsolete The thing given or received in return; especially, a publication exchanged for another.
Lady, as you are mine, I am yours, I giue away my selfe for you, and doat vpon the exchange.1598–1599 (first performance), William Shakespeare, “Much Adoe about Nothing”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act II, scene i]:
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Biochemistry, Biology, Chemistry, Microbiology, Natural sciences, Physical sciences The transfer of substances or elements like gas, amino-acids, ions etc. sometimes through a surface like a membrane.
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Business, Finance The difference between the values of money in different places.
Etymology From Middle English eschaungen, from Anglo-Norman eschaungier, Old French eschanger, from the Old French verb eschangier, eschanger (whence modern French échanger), from Vulgar Latin *excambiāre (from Latin ex with Late Latin cambiō). Gradually displaced native Old English wrixlan, wixlan (“to change, exchange, reciprocate”) and its descendants, wrixle being one of them.