backstamp
transitive verbDefinition of backstamp
(Entry 1 of 2)
: to stamp on the back
specifically
: to stamp (a piece of mail) with the date of receipt and the name of the receiving post office along the transportation route
backstamp
noun
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Definition of backstamp (Entry 2 of 2)
: a stamp (such as a date stamp or postmark) on the back of a piece of mail
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