plateau

n. flat-topped hill, tableland; high flat surface; standstill, lack of progress

In geology and earth science, A plateau, also called a high plateau or tableland, is an area of highland, usually consisting of relatively flat rural area.
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Noun
1. a relatively flat highland
(synonym) tableland
(hypernym) highland, upland
(hyponym) Ardennes

n. plateau, flat-topped hill, tableland; high flat surface

n. tray, platter; plateau, high flat surface, upland