Northum has various meanings in the Ordnance Survey category. Discover the full forms, definitions, and usage contexts of Northum in Ordnance Survey.
Northumberland, historic county and unitary authority of northeastern England. It is England’s northernmost county, bounded to the north by Scotland, to the east by the North Sea, to the west by the administrative county of Cumbria (historic county of Cumberland), and to the south by the county of Durham.
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