1. To fantasize about someone or something, especially doing something as one's goal or ambition. I've dreamed about being an astronaut since I was eight years old. I've dreamed about this moment. I can't believe it's actually happening. Back in high school, I dreamed about him. Now we're together and he's everything to me.

2. To envision someone or something in one's sleep. While recovering from dental surgery, I actually dreamed about all the foods I couldn't eat. Waking up was quite a disappointment! What does it mean if you keep dreaming about the same person every night?