zip code

or ZIP code, Zip code

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a system used in the U.S. to facilitate the delivery of mail, consisting of a five- or nine-digit code printed directly after the address, the first five digits (initial code ) indicating the state and post office or postal zone, the last four (expanded code ) the box section or number, portion of a rural route, building, or other specific delivery location.
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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

Origin of zip code

1960–65, Americanism;Z(one)I(mprovement)P(rogram)

Other definitions for zip code (2 of 2)


or ZIP-code, Zip-code

[ zip-kohd ]
/ ˈzɪpˌkoʊd /

verb (used with object), zip-cod·ed, zip-cod·ing.
to provide or mark with a zip code: Zip-code all mail.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use zip code in a sentence

British Dictionary definitions for zip code

zip code

the US equivalent of postcode

Word Origin for zip code

C20: from z (one) i (mprovement) p (lan)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012