This glossary defines nearly 300 terms frequently encountered by stamp collectors and cover collectors. Precise definitions for many philatelic terms do not exist. One collector, dealer or society may define a term in one way, while others will use the term in a slightly different way.
For special uses of some of the terms listed and defined here, contact the appropriate specialist collector group.
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Zemstvo: A local stamp issued by Russian municipal governments or zemstvos, in accordance with an imperial edict of 1870.
Zeppelins: The stamps issued for, or in honor of, zeppelin flights. Cacheted covers carried on such flights are Zeppelin covers.
ZIP block: "U.S. marginal marking block with the selvage bearing the image of the ""Mr. ZIP"" cartoon character and/or an inscription urging the use of ZIP code. This first appeared on U.S. marginal selvage in 1964. Typically a ZIP block is a block of four stamps."
ZIP code: The U.S. numerical post code used to speed and mechanize mail handling and delivery. The letters stand for Zoning Improvement Plan.