[{"Bold_text": "noun", "List Items": ["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 digitsinitial codeindicating the state and post office or postal zone, the last fourexpanded codethe box section or number, portion of a rural route, building, or other specific delivery location."]}, {"Bold_text": "verb (used with object)", "List Items": ["to provide or mark with a zip code:Zip-code all mail."]}]