In geometry, the augmented dodecahedron is one of the Johnson solids (J_58), consisting of a dodecahedron with a pentagonal pyramid (J_2) attached to one of the faces. When two or three such pyramids are attached, the result may be a parabiaugmented dodecahedron (J_59), a metabiaugmented dodecahedron (J_60), or a triaugmented dodecahedron (J_61).