Terrain/təˈreɪn/ Definition 1 of 3Pro Tip 1/3Literal Ground When 'terrain' is used, it refers to real physical land or ground. Vehicles need to be equipped for snow-covered terrain. Pro Tip 2/3Descriptive Detail Use 'terrain' to describe physical features when mentioning a specific location. The coastal terrain here is dotted with lighthouses. Pro Tip 3/3Beyond Appearance 'Terrain' includes not just how land looks, but also its conditions and qualities. The marshy terrain attracted a variety of birds.