Hanoverian line ha·no·ve·rianline uncommon noun 1. the English royal house that reigned from 1714 to 1901 (from George I to Victoria) SynonymsHanoverHouse of HanoverHanoverian line Related words Broader terms dynastyroyalty Part of HanoverianGeorge IGeorge IIGeorge IIIGeorge IVVictoria WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.