postmark
nounUK /ˈpəʊstmɑːk/
US /ˈpoʊstmɑːrk/
A mark printed on a letter to show when and where it was mailed.
The envelope had a postmark from Paris dated last Tuesday.
RELATED WORDS
OTHER MEANINGS
2. To print an official mark on a piece of mail showing the date and place of mailing.
The clerk postmarked the package before dropping it in the bin.
3. A mark or impression resembling a postal postmark, often used as a sign of authenticity.
The old book bore the postmark of a famous library.
4. A record or indication of origin or date, especially one that is official.
The project carried the postmark of its founding year.