a. 1. Being in the interior country; distant from the coast or seashore; as, midland towns or inhabitants. Howell. [ 1913 Webster ]

2. Surrounded by the land; mediterranean. [ 1913 Webster ]

And on the midland sea the French had awed. Dryden. [ 1913 Webster ]

n. The interior or central region of a country; -- usually in the plural. Drayton. [ 1913 Webster ]