dream

Not until the 13th century was our word dream used in the sense of “a series of thoughts, images, or emotions occurring during sleep.” The word itself is considerably older. In Old English dream means “joy,” “noise,” or “music.” Yet the change in meaning did not come from the development of a more specialized sense. Rather it appears that after many Scandinavian conflicts, conquests, and settlements in Britain the Old Norse draumr, meaning “a dream during sleep,” influenced the meaning of the etymologically related, English word. By the end of the 14th century the earlier meanings had been entirely replaced.