Dream
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 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: You're having this crazy dream. The dream allows you to do anything you want. Every time you ask "hey, can I do this?" The answer is always "you may" (ゆめ). Think of some things you'd want to do if you could do anything. Ask permission and get this answer in your imagination.
うわー、夢みたい！
Wow, it's like a dream come true!
私の夢は日本に行って、日本で働くことです。
My dream is to go and work in Japan.
昨日、コウイチに指圧をしてもらっている夢を見たんだ。
Yesterday, I had a dream that Koichi was giving me a shiatsu massage.