Suprematism (Russian: супремати́зм) is an early 20th-century art movement focused on the fundamentals of geometry (circles, squares, rectangles), painted in a limited range of colors. The term suprematism refers to an abstract art based upon "the supremacy of pure artistic feeling" rather than on the figurative depiction of real-life subjects.

Founded by Russian artist Kazimir Malevich in 1913, Supremus (Russian: Супремус) conceived of the artist as liberated from everything that predetermined the ideal structure of life and art. Projecting that vision onto Cubism, which Malevich admired for its ability to deconstruct art, and in the process change its reference points of art, he led a group of Russian avant-garde artists—including Aleksandra Ekster, Liubov Popova, Olga Rozanova, Ivan Kliun, Ivan Puni, Nadezhda Udaltsova, Nina Genke-Meller, Ksenia Boguslavskaya and others—in what has been described as the first attempt to independently found a Russian avant-garde movement, seceding from the trajectory of prior Russian art history.

To support the movement, Malevich established the journal Supremus (initially titled Nul or Nothing), which received contributions from artists and philosophers. The publication, however, never took off and its first issue was never distributed due to the Russian Revolution. The movement itself, however, was announced in Malevich's 1915 Last Futurist Exhibition of Paintings 0,10, in St. Petersburg, where he, and several others in his group, exhibited 36 works in a similar style.

Kazimir Malevich developed the concept of Suprematism when he was already an established painter, having exhibited in the Donkey's Tail and the Der Blaue Reiter (The Blue Rider) exhibitions of 1912 with cubo-futurist works. The proliferation of new artistic forms in painting, poetry and theatre as well as a revival of interest in the traditional folk art of Russia provided a rich environment in which a Modernist culture was born.

In "Suprematism" (Part II of his book The Non-Objective World, which was published 1927 in Munich as Bauhaus Book No. 11), Malevich clearly stated the core concept of Suprematism:

Under Suprematism I understand the primacy of pure feeling in creative art. To the Suprematist, the visual phenomena of the objective world are, in themselves, meaningless; the significant thing is feeling, as such, quite apart from the environment in which it is called forth.

He created a suprematist "grammar" based on fundamental geometric forms; in particular, the square and the circle. In the 0.10 Exhibition in 1915, Malevich exhibited his early experiments in suprematist painting. The centerpiece of his show was the Black Square, placed in what is called the red/beautiful corner in Russian Orthodox tradition; the place of the main icon in a house. "Black Square" was painted in 1915 and was presented as a breakthrough in his career and in art in general. Malevich also painted White on White which was also heralded as a milestone. White on White marked a shift from polychrome to monochrome Suprematism.

Malevich's Suprematism is fundamentally opposed to the postrevolutionary positions of Constructivism and materialism. Constructivism, with its cult of the object, is concerned with utilitarian strategies of adapting art to the principles of functional organization. Under Constructivism, the traditional easel painter is transformed into the artist-as-engineer in charge of organizing life in all of its aspects.