WordNet

experience while sleeping; "She claims to never dream"; "He dreamt a strange scene"
someone or something wonderful; "this dessert is a dream"
a series of mental images and emotions occurring during sleep; "I had a dream about you last night" (同)dreaming
imaginative thoughts indulged in while awake; "he lives in a dream that has nothing to do with reality" (同)dreaming
a state of mind characterized by abstraction and release from reality; "he went about his work as if in a dream"
have a daydream; indulge in a fantasy (同)daydream, woolgather, stargaze

PrepTutorEJDIC

『夢』 / 『白昼夢』,幻想(daydream) / 抱負,強い希望,夢 / 《話》夢のように美しいもの,魅力のあるもの / 『夢を見る』 / (…を)『夢想する』,思い描く《+『of』(『about』)+『名』(do『ing』)》 / …‘を'『夢に見る』,《a+形容詞+dreamを目的語にして》〈…の夢〉‘を'見る / 《『dream』+『that節』》…‘と'『思う』,想像する / 〈時〉‘を'うかうかと過ごす《+『away』+『名』》