The New Dictionary of Cultural Literacy, Third Edition. 2002.
postmaster general
The head of the United States Postal Service. Until 1970, the postmaster general was head of the federal Post Office Department and a member of the presidents cabinet. In 1970, the Postal Service was set up as an independent agency in place of the Post Office Department. The Postal Service is operated like a private corporation, although postal workers receive the benefits of federal employees.