Definitions
1.NounA flat talisman, almost always star-shaped, made of parchment, sheet metal, or other substance, marked with a magic symbol or symbols, used in magical evocation.
2.NounA pentagram, especially one that is used for magical or mystical purposes.
3.NounA circumscribed pentagram.
4.NounA figure formed by two equilateral triangles intersecting regularly so as to form a six-pointed star. (Can we verify this sense?)