post·mark
ˈpōs(t)-ˌmärk 
: an official postal marking on a piece of mail
specifically
: a mark showing the post office and date of mailing
Examples of postmark in a Sentence
Verb
The package was postmarked 13 February.
Recent Examples on the Web
Evan Moore, Charlotte Observer, 7 Jan. 2026
According to the Federal Register — the federal government’s official journal — the Postal Service is adding a new section to its mail rulebook to better explain how postmarks work.
—Sacbee.com, 6 Jan. 2026
Kate Dore, Cfp®, Ea, CNBC, 8 Jan. 2026
The change could prove a stumbling block for people who need to ensure that mail such as bill payments, taxes or voting ballots are postmarked by specific dates.
—Aimee Picchi, CBS News, 8 Jan. 2026
See All Example Sentences for postmark
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Noun
In some cases, postmarks may also be faint or unreadable.
—Evan Moore, Charlotte Observer, 7 Jan. 2026
According to the Federal Register — the federal government’s official journal — the Postal Service is adding a new section to its mail rulebook to better explain how postmarks work.
—Sacbee.com, 6 Jan. 2026
Verb
Plan for the 'tax bomb,' CFP says USPS changes may delay postmarks.
—Kate Dore, Cfp®, Ea, CNBC, 8 Jan. 2026
The change could prove a stumbling block for people who need to ensure that mail such as bill payments, taxes or voting ballots are postmarked by specific dates.
—Aimee Picchi, CBS News, 8 Jan. 2026
See All Example Sentences for postmark
Cite this Entry
“Postmark.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/postmark. Accessed 10 Jan. 2026.
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