Anti-art is a loosely used term applied to an array of concepts and attitudes that reject prior definitions of art and question art in general. Somewhat paradoxically, anti-art tends to conduct this questioning and rejection from the vantage point of art. The term is associated with the Dada movement and is generally accepted as attributable to Marcel Duchamp pre-World War I around 1914, when he began to use found objects as art. It was used to describe revolutionary forms of art. The term was used later by the Conceptual artists of the 1960s to describe the work of those who claimed to have retired altogether from the practice of art, from the production of works which could be sold.
An expression of anti-art may or may not take traditional form or meet the criteria for being defined as a work of art according to conventional standards. Works of anti-art may express an outright rejection of having conventionally defined criteria as a means of defining what art is, and what it is not. Anti-artworks may reject conventional artistic standards altogether, or focus criticism only on certain aspects of art, such as the art market and high art. Some anti-artworks may reject individualism in art, whereas some may reject "universality" as an accepted factor in art. Additionally, some forms of anti-art reject art entirely, or reject the idea that art is a separate realm or specialization. Anti-artworks may also reject art based upon a consideration of art as being oppressive of a segment of the population.