It means States or Governments who are working or living sister. The Union of several States. Name who have received several countries which resulted from the union of several States, some of which already changed their name (Brazil, Colombia, Venezuela and Belgium) and others who still have it (Mexico and United States of America). Geographically it is the name of a country made up of 50 States and a district, which is located in North America and whose Capital is Washington. There was also the project of creating the United States of Latin Africa.
United States of America (in English United States of America), also known as the United States of America by being located in the North of this continent, is a sovereign country which is composed of fifty States and a federal district. You can abbreviate U. S. A. EE. UU. or USA. Although the official language is English, in most of its States also speaks Spanish.