Eight
numeral
When a vocab is a single kanji it usually steals its meaning from its kanji as well. Same goes for this vocab word. It means eight.
はち
When a vocab is a single kanji and all alone like this, it's usually going to use the kun'yomi. But, because this is a number (exception) it uses the on'yomi instead, meaning you already know the reading from when you learned the kanji!
がくせいは、きょううちで、八ページをべんきょうします。
Students will study page eight at home today.
あめを八こカバンに入れました。
I put eight candies in my purse.
八じ？ほんとうに、八じ？
Eight o’clock? Are you sure it’s eight o’clock?