zip code

Definition of Zip Code in English :

a code of letters and digits added to a postal address to aid in the sorting of mail

WordNet Lexical Database for English. Princeton University. 2010.

Zip Code

noun

the US equivalent of postcode

1.

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

2. [usually zip c-]

such a code number, typically consisting of five digits, although often expanded to nine

n.

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.