• (p. pr. & vb. n.) of Terrace
Stepped terrain around the inside slopes of large craters, which has resulted from slumping and sliding of blocks of land. Although usually associated with impact craters with diameters of over 20 km, terracing can occur within volcanic craters, especially collapse craters and calderas.
terracing 1. A series of level, fairly narrow strips of ground constructed on a hillside that would otherwise be too steep for cultivation.2. The act or process of creating a terrace or terraces.
Dikes built along the contour of sloping farm land that hold runoff and sediment to reduce erosion. 
The process of building walls to hold the soil in place on a sloped landscape.