postcode

Short definition from Wiktionary

Noun

1. 1
   A sequence of letters and numbers added to a postal address to aid the sorting and delivery of post or mail.
2. 2
   A sequence of letters and numbers added to a postal address to aid the sorting and delivery of post or mail: The region denoted by such a sequence.
3. 3
   A four-digit number added to a postal address to sort and deliver mail.

Verb

1. 1
   To give a postcode to; to mark with a postcode.