North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776;
Synonyms: United States / United States of America / America / the States / us / U.S. / U.S.A.
usa (n.)
the army of the United States of America; the agency that organizes and trains soldiers for land warfare;
Synonyms: United States Army / US Army / U. S. Army / Army