Star
noun
The kanji and the word are exactly the same. That means they share meanings as well.
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.
北海道には美しい星空が広がっています。
A beautiful starry sky stretches over Hokkaido.
フルーツをハート形や星形に切るとかわいいし、小さい子にも人気ですよ。
Fruits cut into heart and star shapes are cute, and popular with children.