Dictionary
dream' vi"sion
a conventional device used in narrative verse, employed esp. by medieval poets, that presents a story as told by one who falls asleep and dreams the events of the poem:
Dante's Divine Comedy
exemplifies the dream vision in its most developed form. Also called
dream' al"legory. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.