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Definition of zipcode

zipcode

/ˈzɪpˌkoʊd/
zip · code
Plural:zipcodes
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zipcode Lexical Profile

zipcode Game Scores & Validity

• noun

1

American A postal code consisting of five or nine digits assigned by the United States Postal Service to identify a specific geographic delivery area for efficient mail sorting.

Example

"Please enter your five-digit zipcode to calculate the shipping cost for your order."

Synonyms
View all synonyms for zipcode

Word Nuance & Usage

Although frequently written as a single closed compound ('zipcode'), the official and more common spelling used by the United States Postal Service is the two-word open form 'ZIP code'.

• Nearby Words

zinnia
zion
zip
zipcode
zipfile
zipline
ziplock

Word Origin & Etymology

Introduced by the United States Post Office Department in 1963, 'ZIP' is an acronym for Zone Improvement Plan, chosen to suggest that mail travels faster when senders use the code.

Cite this Entry

Wordmom. (2026). Definition of Zipcode. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/zipcode
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