dream within a dream; pie in the sky; unrealizable dream
A set phrase meaning something so unlikely it is like a dream inside another dream; used for hopes or plans that are almost impossible to realize.
Winning a hundred million yen in the lottery is just a dream within a dream.
World peace may be a pie in the sky, but we must not give up.
Standard kanji-kana mixed spelling.
Variant using the kanji 又 for また; less common but still seen.
Literally 'a dream of a dream', from 夢 (dream) + の (possessive particle) + また (again, further) + 夢 (dream). The phrase suggests a dream nested within another dream, emphasizing extreme remoteness from reality.