Next
noun, の adjective
The kanji and the word are exactly the same. That means they share meanings as well.
つぎ
Since this word is made up of a single kanji, it should use the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word: Someone yells out "NEXT!" because the first thing didn't work on you. That was a single guillotine. Now they are going to try two guillotines (つぎ) and see how that works on your thick neck. NEXXXXT!
次のバスで行きましょう。
Let's go with the next bus.
次の日は、お休みですか？
Do you have the day off on the next day?
次は、あなたです。
It's your turn next.