Rice
noun
The kanji and the word are exactly the same. That means they share meanings as well. Note that this word refers to the grains of rice more than something that's a meal. If you're eating rice at a meal you'd call it ごはん. This is like when you're talking about the rice in the fields or rice grains or something like that.
こめ
Since this word is made up of a single kanji, it should use the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word: "Everyone, we have rice! Come (こめ) and get it!"
これはカリフォルニアの米です。
This is rice from California.
米は一キロ当たり五百円です。
Rice costs 500 yen per kilogram.
日本で米が不足することは、あまりない。
Rice shortages rarely happen in Japan.