Students will study page eight at home today.
I put eight candies in my purse.
Eight o’clock? Are you sure it’s eight o’clock?
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.
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!