Double bar
DEFINITION
A set of two vertical lines drawn perpendicularly through the staff to indicate the end of one section and the beginning of another in a larger composition. A double bar with a thin line followed by a heavy line is known as a final barline and indicates the end of the composition. Also [Eng.] double bar; [Fr.] double-barre; [Ger.] Doppeltaktstrich; [It.] doppia barra; [Sp.] doble barra.