Region of uniform general slope, comparatively level, of considerable extent, and not broken by marked elevations and depressions (it may be an extensive valley floor or a plateau summit); an extent of level or nearly level land; a flat, gently sloping, or nearly level region of the sea floor.
159] For a young woman to dream of crossing a plain, denotes that she will be fortunately situated, if the grasses are green and luxuriant; if they are arid, or the grass is dead, she will have much discomfort and loneliness.  See Prairie.
In geography, a plain is a large area of land with relatively low relief. Plains may be more suitable for farming than plateaus or mountains. An alluvial plain is a landform formed by the deposition of alluvial soil over a long period of time by a river coming from the mountains.
A straightforward, unembellished surface with no pattern or direction. Plain-style laminate can be cut and used without repeats or differentiating marks. The style includes the smooth, solid colours of the Plain Colours and ColorCore ranges of laminate.
clearly apparent or obvious to the mind or senses; "the effects of the drought are apparent to anyone who sees the parched fields"; "evident hostility"; "manifest disapproval"; "patent advantages"; "made his meaning plain"; "it is plain that he is no reactionary"; "in plain view"
unmistakably (`plain' is often used informally for `plainly'); "the answer is obviously wrong"; "she was in bed and evidently in great pain"; "he was manifestly too important to leave off the guest list"; "it is all patently nonsense"; "she has apparently been living here for some time"; "I thought he owned the property, but apparently not"; "You are plainly wrong"; "he is plain stubborn"
Leaf type. Sometimes called standard or boy-type, so named for Blue Boy, the hybrid from which this leaf type was first known. Describes an African Violet leaf which has no remarkable characteristics. Also see Tailored.