Definitives.org

An ordinary world

You are in:

Glossary of philatelical terms

U.N.
Abbreviation for United Nations.
U.P.A.E.
Acronym for Union Postal de las Americas y España (Postal Union of the Americas and Spain).
U.P.U.
Universal Postal Union: organization born in 1863 to regulate international postal usages and rates.
UN
In english catalogues: abbreviation for unused.
UNCATALOGUED
Stamp known to exist, but not listed in the catalogue.
UNESCO
Acronym for United Nations Educational, Scientific and Cultural Organization.
UNIFICATO
Italian stamp catalogue. It covers Italian Area, Western Europe, U.S.A., Israel and some other European countries.
UNIQUE
Stamp of which only a piece is known.
UNISSUED
Stamp ready for use but not issued.
UNITED NATIONS
Stamps sold in United Nations buildings of New York, Geneva and Vienna. They have postal validity in all the world.
USED
Stamp regularly used for sending a letter or for some postale service. Usually it is cancelled and does not have any gum on its back side.

New search in our glossary

Subscribe our newsletter

Our newsletter will keep you up-to-date with the latest changes to our site. Join us. It's free!