Meaning

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 even

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

originBorrowed from French fugue, from Italian fuga (“flight, ardor”), from Latin fuga (“act of fleeing”), from fugiō (“to flee”); compare Ancient Greek φυγή (phugḗ). Apparently from the metaphor that the first part starts alone on its course, and is pursued by later parts. Doublet of fuga.

Etymology from Wiktionary, CC BY-SA 3.0