Postmark

What is Postmark ?

Postmark is (noun) a mark stamped on a letter to show when and where it was posted a letter with a London postmark You can see from the postmark that it was posted two weeks ago. Synonym date stamp (verb) to stamp a letter with a postmark The letter had been postmarked in New York. Synonym frank

 

source: Easier English, Student Dictionary Upper Intermediate Level