All America
noun
Do you remember how 米国 can mean "America?" That 米 means America sometimes. So, when you see all rice (I mean, America), you can think of this word as meaning All America (sort of like how 全日本 means "All Japan.").
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
全米No.1
number one in America
全米ヒットチャート
all-American hit chart
全米オープン
the US Open (tennis)
これは、全米で人気の大作です。
This is a popular blockbuster in all of America.
今、全米ヒットチャートでナンバーワンの曲は何ですか?
What is the number one song on the US hit chart now?
全米のテレビ局から、インタビューのオファーが来た。
An interview offer came from a nationwide television station.