House of Lancaster hou·seof·lan·caster uncommon noun 1. the English royal house that reigned from 1399 to 1461; its emblem was a red rose SynonymsLancasterHouse of LancasterLancastrian line Related words Broader terms dynastyroyalty Part of LancastrianHenry IVHenry VHenry VI WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
