English
foredream
From fore- + dream.
Proto-Indo-European *per- ‘before, formerly’
Proto-Germanic *fura- ‘before, in front of, for’
Proto-West Germanic *forē- ‘before, in front of, fore-, pre-’
English fore-
Proto-Indo-European *dʰrewgʰ- ‘to deceive’
…
Proto-Germanic *draumaz ‘dream’
Proto-West Germanic *draum
Old English drēam ‘joy; music’
Middle English dream
English dream
Today it means
noun a dream dreamt in advance, especially regarding a future condition or event; a hopeful expectation; a hope
Language periods are conventional ranges, not dates for this word.
Etymograph / foredream