from The American Heritage® Dictionary of the English Language, 4th Edition
- A vast plateau region of the central Arabian Peninsula. It was the nucleus for the modern state of Saudi Arabia.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a central plateau region of the Arabian Peninsula; formerly an independent sultanate until 1932 when it united with Hejaz to form the Kingdom of Saudi Arabia
Sorry, no etymologies found.