The United States of America; the U.S.
米国は世界で最も経済力のある国の一つだ。
The United States is one of the world's most economically powerful countries.
彼は大学時代に米国に留学していた。
He studied abroad in the United States during university.
米国製の車は燃費が良くないと考える人もいる。
Some people think cars made in the U.S. don't have good fuel efficiency.