1.
dream (during sleep)
A series of images and sensations during sleep.
夢を見た。
I had a dream.
昨夜変な夢を見た。
I had a strange dream last night.
夢の中で空を飛んでいた。
I was flying in my dream.
怖い夢を見て、夜中に目が覚めた。
I woke up in the middle of the night after having a scary dream.
子供の頃から同じ夢を何度も見るので、不思議に思っている。
I've been having the same dream repeatedly since childhood, and I find it mysterious.
2.
dream, aspiration
A hope or ambition for the future.
夢がある。
I have a dream.
医者になるのが夢です。
My dream is to become a doctor.
夢を諦めないでください。
Please don't give up on your dream.
長年の夢がやっと叶った。
My long-held dream finally came true.
小さい頃からの夢だった会社に入ることができて、とても嬉しい。
I'm very happy that I was able to join the company I'd dreamed of since I was little.
夢 has two meanings: dreams during sleep and aspirations/ambitions.
SLEEP DREAMS:
- 夢を見る: to have a dream (NOT 夢がある)
- 悪夢: nightmare
- 夢の中で: in a dream
ASPIRATIONS:
- 夢がある: to have a dream/goal
- 夢が叶う: dream comes true
- 夢を諦める: to give up on a dream
- 夢を追いかける: to chase a dream
COMPOUNDS:
- 夢中: absorbed, engrossed
- 白昼夢: daydream
- 初夢: first dream of the new year
IDIOM:
夢のよう: dreamlike, too good to be true