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Comprehensive
Dictionary Suite
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cancellation the marks or perforations indicating invalidation for reuse, as on a postage stamp or admission ticket. [1/3 definitions]
imperforate unperforated, as some postage stamps. [2/3 definitions]
overprint anything printed over the face of a postage stamp which designates its use or character, or the stamp so altered. [1/3 definitions]
philately the study and collection of postage stamps and things related to them, such as postmarks; stamp collecting.
postmark an official mark that cancels the postage stamp on a piece of mail and shows the date and place of mailing. [1/2 definitions]
stamp to place a postage stamp upon. [2/15 definitions]