[North.um.bri.an] adj (1622) 1: of, relating to, or characteristic of ancient Northumbria, its people, or its language
2: of, relating to, or characteristic of Northumberland, its people, or its language
[2]Northumbrian n (1752) 1: a native or inhabitant of ancient Northumbria
2: a native or inhabitant of Northumberland 3 a: the Old English dialect of Northumbria b: the Modern English dialect of Northumberland