The phrase "flat expanse" means a wide and open area that is completely level, without any hills or bumps.
Sentences with «flat expanse»
Its more aggressive composition illustrates a further duality that characterizes Ideal's work — the layering of flat expanses of color with painterly brush strokes. (davidrichardgallery.com)
Taylor's paintings are some of the best that he has exhibited, with flat expanses of white and browns interrupted by drips and smudges. (moussemagazine.it)
It can be seen as a response to the landscape - where scattered elements punctuate flat expanses. (hamptonsarthub.com)