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English Lexicon

Zip code

/ˈzɪp ˌkoʊd/
nounCEFR B1 (Intermediate)Top #4500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A system of postal codes used by the United States Postal Service since 1963 to route mail more efficiently.

    "Please write your zip code at the bottom of the mailing address."
  2. 2

    A specific numerical postal code designating a distinct delivery region or locality.

    "Do you know the zip code for downtown Seattle?"
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Linguistic Origin & Historical Etymology

Coined in the United States in 1963 by the United States Postal Service, ZIP stands for Zone Improvement Plan. The term 'code' derives from Latin codex, referring to a systematic arrangement of letters or numbers for classification.

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