postmark

1 of 2

noun

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

postmark

2 of 2

verb

postmarked; postmarking; postmarks

transitive verb

: to put a postmark on

Examples of postmark in a Sentence

Verb

The package was postmarked 13 February.

Recent Examples on the Web

Noun

In Garfield County, in southeastern Washington, 19 ballots — nearly 1 in 10 cast — had late postmarks this year. — Ken B. Morales, ProPublica, 22 Oct. 2026

The note said the mail could be indicated by discoloration, powder emanating from the envelope and postmarks that do not match the return address. — Eric McDaniel, NPR, 15 Oct. 2026

Verb

The changes often added a day or more to delivery time and pushed back postmarking, an official mark confirming an envelope has been received by the Postal Service. — ProPublica, 30 Oct. 2026

To ensure your ballot is postmarked by election day, mail it at least by Thursday — five days before Tuesday’s election. — Karen Garcia, Los Angeles Times, 29 Oct. 2026

Word History

First Known Use

Noun

1678, in the meaning defined above

Verb

1716, in the meaning defined above

Rhymes for postmark

• ballpark
• benchmark
• birthmark
• daymark
• earmark
• embark
• hallmark
• landmark
• monarch
• remark
• skylark
• tetrarch

Kids Definition

postmark

noun

post·​mark

-ˌmärk

: a mark canceling the postage stamp on a piece of mail and giving the date and place of sending

postmark verb