Noun:
1: us, united states of america, united states, america, usa, u.s., u.s.a., the states 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
2: us army, united states army, usa, u. s. army, army the army of the United States of America; the agency that organizes and trains soldiers for land warfare