夢の夢

dream within a dream; (beyond) one's wildest dreams; entirely unrealizable dream; pie in the sky

夢

ゆめ

dream

霊

れい

soul, spirit, departed soul, ghost

夢のまた夢

ゆめのまたゆめ

beyond one's wildest dreams, dream within a dream

夢の中の夢

ゆめのなかのゆめ

A Dream Within a Dream (1849 poem by Edgar Allan Poe)

夢オチ

ゆめオチ ゆめおち

"it was all a dream"-ending

夢枕

ゆめまくら

at the bedside where one dreams

空夢

そらゆめ

fabricated dream

甘夢

かんむ あまゆめ

sweet (pleasant) dreams

逆夢

さかゆめ

a dream which is contradicted by reality

旧夢

きゅうむ きゅうゆめ

ancient dream, fleeting thing

夢現

ゆめうつつ

half asleep and half awake, trance

正夢

まさゆめ

dream that comes true

夢幻

むげん ゆめまぼろし

dreams, fantasy, visions

夢寐

むび

asleep, dreaming

夢路

ゆめじ

dreaming

怪夢

かいむ

strange dream

迷夢

めいむ

illusion, fallacy, delusion

銃夢

がんむ

Battle Angel Alita (manga and anime)