Sorcery is traditionally defined as any magical system that involves the use of tools and other materials to bring about magical change for personal gain or improvement. Sorcery may involve evocation, or not and is generally lumped in with High Magick arts.
For some, sorcery implies the left hand path. For others, it implies Judeo-Christian magical systems such as Goetia. Many people who self-identify as sorcerers enjoy magical and spiritual exploration and experimentation.