Malwa is an Indian historical doab region of west-central India occupying a plateau of volcanic origin. Geologically, the Malwa Plateau generally refers to the volcanic upland north of the Vindhya Range. Politically and administratively, it is also synonymous with the former state of Madhya Bharat which was later merged with Madhya Pradesh, and presently the historical Malwa region includes districts of western Madhya Pradesh and parts of south-eastern Rajasthan, sometimes the definition of Malwa is extended to include the Nimar region south of the Vindhyas.