from The American Heritage® Dictionary of the English Language, 4th Edition
- An Anglo-Saxon kingdom of northern England formed in the seventh century by the union of Bernicia and Deira, Angle kingdoms originally established c. A.D. 500. Much of Northumbria fell to invading Danes in the ninth century and was annexed to Wessex in 954.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. North-east England; Northumberland.
- proper n. An Anglo-Saxon kingdom in the Northeast of England.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an Anglo-Saxon kingdom in northern England until 876
Possibly from North of the River Humber. (Wiktionary)