any mark stamped on mail by postal officials, such as a simple obliteration, date mark, or indication of route 
See also cancellation
- (transitive)
to put such a mark on mail  
    
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postmarkUK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈpəʊstmɑːrk/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/ˈpoʊstˌmɑrk/ ,USA pronunciation: respelling(pōst′märk′)  
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        WordReference Random House Learner's Dictionary of American English © 2025 post•mark /ˈpoʊstˌmɑrk/USA pronunciation  
n. [countable] WordReference Random House Unabridged Dictionary of American English © 2025
 v. [~ + object] 
 post•mark 
(pōst′märk′),USA pronunciation n.  
 v.t. 
 
 Collins Concise English Dictionary © HarperCollins Publishers:: 
 
 'postmark' also found in these entries (note: many are not synonyms or translations):
 
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