Outsider art is art made by self-taught individuals who are untrained and untutored in the traditional arts with typically little or no contact with the conventions of the art worlds.

The art world comprises everyone involved in producing, commissioning, presenting, preserving, promoting, chronicling, criticizing, buying and selling fine art. It is recognized that there are many art worlds, defined either by location or alternative definitions of fine art. Some may use the singular art world to refer only to the elite level of globalized fine art. The art world(s) are continually changing in response both to the creativity of those that create art and in response to social change.