Nancy Witcher Astor nan·cy·witc·herastor uncommon noun 1. British politician (born in the United States) who was the first woman to sit in the British House of Commons (1879-1964) SynonymsAstorNancy Witcher AstorViscountess Astor Related words Broader terms viscountesspolitician WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.