post·mark
noun/ˈpəʊstmɑːk/
/ˈpəʊstmɑːrk/
- an official mark placed over the stamp on a letter, etc. that shows when and where it was posted and makes it impossible to use the stamp again
邮戳 - The envelope had an Atlanta postmark.
信封上盖有亚特兰大邮戳。
- The envelope had an Atlanta postmark.