(n.) An extensive plain with or without vegetation.

alkali flat alluvial plain basin bottomland bushveld campo champaign champaign country coastal plain delta desert down downs fell flat flat country flatland flats grass grass veld grassland grazing haugh haughland heath lande lea level lowland lowlands lunar mare mare mead meadow meadow land mesa mesilla moor moorland open country pampa pampas park pasturage pasture pasture land peneplain plain plains plateau playa prairie range salt flat salt marsh salt pan savanna sebkha steppe steppeland swale table tableland tree veld tundra upland vega veld weald wide-open spaces wold