zip code: Meaning and Definition of

zip' code"

1. 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 digitsindicating the state and post office or postal zone, the last fourthe box section or number, portion of a rural route, building, or other specific delivery location.

zip-code

1. to provide or mark with a zip code: Zip-code all mail.