plural postmarks
: a mark placed over the stamp on a piece of mail that shows when the mail was sent and where it was sent from and that makes it impossible to use the stamp again
postmarks; postmarked; postmarking
: to put a postmark on (something)
The package was postmarked 13 February.
Cite this Entry
“Postmark.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/postmark. Accessed 20 Jun. 2026.
Copy Citation
