fugue

(noun) dissociative disorder in which a person forgets who they are and leaves home to creates a new life; during the fugue there is no memory of the former life; after recovering there is no memory for events during the dissociative state. Synonyms: psychogenic fugue.

(noun) a dreamlike state of altered consciousness that may last for hours or days.

(noun) a musical form consisting of a theme repeated a fifth above or a fourth below its first statement.