When a work of art such as Kasimir Malevichs Black Square shows no reference to the natural world of images it is called?

When a work of art like Kazimir Malevich's "Black Square" shows no reference to the natural world, it is referred to as non-representational or non-objective art. This style emphasizes the use of color, shape, and form without depicting recognizable subjects, prioritizing the expressive potential of the artwork itself. Such works challenge traditional notions of representation and invite viewers to engage with the piece on a purely formal level.