postmark

Definitions of postmark
  1. noun
    a cancellation mark stamped on mail by postal officials; indicates the post office and date of mailing
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    type of:
    insignia, mark, marker, marking
    a distinguishing symbol
  2. verb
    stamp with a postmark to indicate date and time of mailing
    synonyms: frank
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    type of:
    stamp
    to mark, or produce an imprint in or on something
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