plain. Land, usually flat, upon which grass predominates. The plains cover large areas of the Earth's surface, especially between the deserts of the tropics and the rainforests of ...
Thesaurus Legend: Synonyms Related Words Antonyms. Adj. 1. unmingled - not mixed with extraneous elements; "plain water"; "sheer wine"; "not an unmixed blessing"
plain, large area of level or nearly level land. Elevated plains are called plateaus plateau, elevated, level or nearly level portion of the earth's surface, larger in summit area ...