Sultanate of Oman sul·ta·na·teofoman uncommon noun 1. a strategically located monarchy on the southern and eastern coasts of the Arabian Peninsula; the economy is dominated by oil SynonymsOmanSultanate of OmanMuscat and Oman Related words Broader terms Asian country Parts Arabian PeninsulaGulf StatesAsiaArab League Part of MuscatOmani WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.