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 a digital-first tax environment, the post office plays a smaller role than it once did—but for those who still depend on it, checking local hours and ensuring timely postmarks remains essential. Update 4/15/25 9:24 a.m. —Josh Hammer, MSNBC Newsweek, 14 Apr. 2025

It’s considered timely if the postmark date is on or before the due date. —Kelly Phillips Erb, Forbes.com, 2 Apr. 2025

Verb

To ensure a tax return is postmarked on or before the due date, USPS advises filers take their return to a local post office location, go to the retail counter, and ask the retail associate to postmark it. —Josh Hammer, MSNBC Newsweek, 14 Apr. 2025

The final election results will not be certified until April 28 and there could be more twists and turns as the Santa Clara County Registrar of Voters will continue to count mail-in ballots until Tuesday so long as they were postmarked by April 8. —Devan Patel, Mercury News, 11 Apr. 2025

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