The currency of the United States (US dollar, USD); a common abbreviation used in exchange rates and international prices.
商品の価格は米ドルで表示されています。
The price of the product is listed in US dollars.
円と米ドルの為替レートが今日大きく変動した。
The exchange rate between the yen and the US dollar fluctuated significantly today.
海外旅行では米ドルを両替して持っていくと便利だ。
When traveling abroad, it's convenient to exchange for US dollars and carry some.