The term 'Sign of Mourning' refers to two items that are traditionally worn by those in mourning. The first is a CRAPE, which is a thin, black fabric made from silk or wool. It is often draped over mirrors and pictures in the home of the deceased, as well as worn by the bereaved. The second item is a VEIL, which is a piece of fabric that covers the head and face. Both of these items are used to signify grief and sorrow, and are often worn during funerals and other memorial services.