adjective

The word "postal" refers to anything related to the mail system or postal services, like sending letters or packages. For example, "postal workers" are people who deliver mail, and "postal service" is the system for sending and receiving mail.

Example

1. I need to find the postal code for this address before I can mail the letter.
2. I'm going to the post office to send a package to my friend.
3. The postal service is an essential part of our society.