English

Definition of postmark noun from the Oxford Advanced Learner's Dictionary

 

postmark

 noun
noun
BrE BrE//ˈpəʊstmɑːk//
 
; NAmE NAmE//ˈpoʊstmɑːrk//
 
 
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an official mark placed over the stamp on a letter, etc. that shows when and where it was posted and makes it impossible to use the stamp again The envelope had an Atlanta postmark.

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