Star
noun
The kanji and the word are exactly the same. That means they share meanings as well.
ほし
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you:
A star is just a whole sheep (ほし) floating in the sky. If it wasn't a whole sheep, it wouldn't shine so brightly and you wouldn't be able to see it from Earth. Don't let anyone tell you stars are made of gas. The whole thing is sheep, okay?
夜には、星がとてもきれいでした。
That night the stars were really pretty.
今夜はたくさんながれ星が見れるといいんですが。
I hope we can see a lot of shooting stars tonight.
お父さん、どうして今日は星型のメガネをかけているの？
Dad, why are you wearing star-shaped glasses today?