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postmark

American  
[pohst-mahrk] / ˈpoʊstˌmɑrk /

noun

postmarks plural
  1. an official mark stamped on letters and other mail, serving as a cancellation of the postage stamp and indicating the place, date, and sometimes time of sending or receipt.


verb (used with object)

postmarks, present (3rd person singular) postmarked, past participle, past postmarking present participle
  1. to stamp with a postmark.

postmark British  
/ ˈpəʊstˌmɑːk /

noun

  1. any mark stamped on mail by postal officials, such as a simple obliteration, date mark, or indication of route See also cancellation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (tr) to put such a mark on mail

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

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Etymology

Origin of postmark

First recorded in 1670–80; post 3 + mark 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Mail-in ballots with an election day postmark will be accepted by county election officials through Tuesday.

From Los Angeles Times Jun. 4, 2026

Make sure to see the envelope handstamped with the postmark instead of tossing the letter in the mailbox, O’Saben added.

From MarketWatch Apr. 9, 2026

Fourteen US states allow mail-in ballots to be tallied after the date of the election if they bear a postmark by Election Day.

From Barron's Mar. 23, 2026

Legal and administrative systems have for decades treated a postmark as evidence of when an individual met a deadline.

From The Wall Street Journal Jan. 8, 2026

As she returns to her office, she realizes there’s no stamp or postmark on the new envelope, worries that the professor will suspect something.

From "The Namesake" by Jhumpa Lahiri

But a lifelong interest in stamps and postmarks seem to have led to him taking letters that caught his eye.

From BBC Mar. 25, 2025

States set their own election laws, and most rely on postmarks to determine if a vote was cast in time.

From Seattle Times May 21, 2024

Its postmarks can legally serve as documentation of when an item was mailed, whether a postcard or a ballot.

From Los Angeles Times Sep. 29, 2021

“Municipal clerks did not consider postmarks on return ballots because they are irrelevant.”

From Washington Times Feb. 7, 2021

“I am sorry we didn’t find your mom. Looking for postmarks was a cool idea.”

From "South of Somewhere" by Kalena Miller

WASHINGTON—The Supreme Court on Monday upheld state laws that count mailed ballots if they are postmarked by Election Day but arrive a few days afterward.

From The Wall Street Journal Jun. 29, 2026

In California, mail-in ballots postmarked by Election Day are legally counted as they arrive in the days following.

From Salon Jun. 11, 2026

This delayed overtaking of Pratt by Raman was largely expected, because California’s vote-by-mail system accepts ballots postmarked on or before Election Day and received within seven days of the election.

From Slate Jun. 11, 2026

Vote-by-mail ballots postmarked on or before election day and received within seven days after the election, as well as any provisional ballots cast, must still be counted, the California secretary of state said.

From BBC Jun. 4, 2026

Why would there be letters postmarked from the front of a war Theo never fought in?

From "The Brightwood Code" by Monica Hesse

The Postal Service, however, hasn’t viewed the record-keeping use of postmarking as a service.

From The Wall Street Journal Jan. 8, 2026

Communities located outside the circles are affected by the postmarking change.

From Los Angeles Times Oct. 2, 2025

Most postmarking takes place in Anchorage, a day or more away by mail from most of the state.

From Seattle Times Sep. 15, 2020

First of all, there’s a difference in messaging between mailing and postmarking.

From Slate Jul. 30, 2020

The chamber organizes the Valentine's Day postmarking program and also hosts a business decorating contest.

From Washington Times Feb. 13, 2017

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