counterstamp

[ noun koun-ter-stamp; verb koun-ter-stamp ]

noun

1. a stamp added to a stamped paper or document as a qualifying mark.
2. Numismatics. countermark ( def 1 ).

verb (used with object)

1. to stamp (a paper or document) already stamped.
2. Numismatics. countermark ( def 2 ).

Word History and Origins

Origin of counterstamp¹

counter- + stamp