Doab is an word used in India and Pakistan and means a piece of land between two rivers, extending to where the two rivers meet. The most important of these is between the Ganges and Yamuna rivers.
Images for kids
The Doab, United Provinces, 1908 map
A map of the Punjab region ca. 1947 showing the different doabs.
In any doab, khadir land (green) lies next to a river, while bangar land (olive) has greater elevation and lies further from the river