白い (shiroi) means "white." This い-adjective describes the color white, like snow or milk. It's often associated with purity or cleanliness. For example, "白いシャツを着ています。" (Shiroi shatsu o kiteimasu.) means "I am wearing a white shirt."

「白い(しろい)」は雪(ゆき)のような色(いろ)。例：白い(しろい)シャツ。