karst / kärst/ • n. Geol. landscape underlain by limestone that has been eroded by dissolution, producing ridges, towers, fissures, sinkholes, and other characteristic landforms. DERIVATIVES: kars·tic / ˈkärstik/ adj.kars·ti·fi·ca·tion / ˌkärstəfiˈkāshən/ n.kars·ti·fy / ˈkärstəˌfī/ v. (-fies, -fied) .
1. Area of the Dinaric Alps of Yugoslavia underlain by limestone.
2. Any region underlain by limestone and characterized by a set of land-forms resulting largely from the action of carbonation.
3. By extension, regions in which other processes produce similar types of landforms, e.g. thermokarst in the periglacial environment.