From Longman Dictionary of Contemporary Englishzip codeˈzip code ●●○ noun [countable] American EnglishTCM a number that you write at the end of an address on an envelope, package etc. The zip code shows the exact area where someone lives and helps the post office deliver the post more quickly. SYN postcode British English
Examples from the Corpus
zip code• The records will be sorted by zip code and displayed on the screen.• Especially strong was Marin County, where every single zip code bounced back, sometimes in spectacular fashion.• Today, their zip code boasts the most expensive residential real estate in the Bay Area.From Longman Business Dictionaryzip codeˈzip code noun [countable] American English a number that you put below the address on an envelope to help the postal service deliver the mail more quicklySYNpostcode BrEOrigin ZIP code (1900-2000) zone improvement plan 