ZIP CodeZIP code
a system of code numbers assigned by the postal service to be used as part of the mailing address: each code designates a delivery area
Origin of ZIP CodeZ(one) I(mprovement) P(lan)
[usuallyzip c-] such a code number, typically consisting of five digits, although often expanded to nine
also zip code
A series of digits designating a specific locality in the United States, appended to a postal address to expedite the sorting and delivery of mail.
Origin of ZIP codeOriginally a trademark
(plural zip codes)
- (chiefly US) A postal code, especially for addresses served by the US Postal Service, consisting of a five- or nine-figure number.
OriginSee also: postal code
From Zone Improvement Plan