n. /kown"teuhr stamp'/ ; v. /kown"teuhr stamp"/ , n.
1. a stamp added to a stamped paper or document as a qualifying mark.
2. Numis. countermark (def. 1).
v.t.
3. to stamp (a paper or document) already stamped.
4. Numis. countermark (def. 2).
[ COUNTER- + STAMP ]