tepui /ˈtɛpwi/ noun1 •A type of table-top mountain or mesa found in the Guiana Highlands of South America, especially in Venezuela.One of the most dominant landscape features in the Gran Sabana is a flight of planation surfaces rising from modern sea level to the summits of the high tepui (Briceño and Schubert 1990). — 2010 formstepuies · tepuis