"free surface" in German free surface freie Oberfläche Wasserspiegel Detailed translations for "free surface" free surface 1. general free surface(also: open condition of surface, free surface) freie Oberfläche free surface(also: water surface, water table) der Wasserspiegel{masculine} 2. of ground water free surface(also: free surface, open condition of surface) freie Oberfläche