Definition from Wiktionary, the free dictionary
from Zone Improvement Plan
- (chiefly US) A postal code, especially for addresses served by the US Postal Service, consisting of a five- or nine-figure number.
- (US) A region within which all addresses share a certain five-digit postal code.
- A lot of people in this area have lived in the same ZIP code their whole lives.
US postal code
region covered by one postal code