The meaning of POSTCODE is a code (as of numbers and letters) used similarly to the zip code especially in the United Kingdom and Australia. z9DwxY. The meaning of POSTCODE is a code (as of numbers and letters) used similarly to the zip code especially in the United Kingdom and Australia. A postal or postcode is a numerical code post authorities assign to a specific region or area within a country. These codes consist of digits, though alphanumeric combinations may appear in specific situations. The length and structure of postal codes vary depending on the country and postal system. Postal codes are a set of numbers, a particular set of numbers (although it sometimes includes letters too) that helps postal services determine the destination of a mail. The postal code allows mail to reach its destination, and full ZIP+4 ensures it reaches the destination ASAP.

what does postal code mean