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Definition of Universal Postal Union
1. Proper noun. A worldwide postal organization to which most countries are members. The exchange of mail, except parcel post, between the United States and other nations is governed by the provisions of the Universal Postal Union convention'''Joint Publication 1-02 ''U.S. Department of Defense Dictionary of Military and Associated Terms; 12 April 2001 (As Amended Through 14 April 2006).'''''. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Universal Postal Union
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