An Electress (Kurfürstin, electrix) was the consort of a Prince-elector of the Holy Roman Empire, one of the Empire`s greatest princes. The Golden Bull of 1356 established by Emperor Charles IV settled the number of Electors at seven. However, three of these were Roman Catholic archbishops, and so had no formal consorts; while of the four secula....
• (n.) The wife or widow of an elector in the old German empire.
E·lect'ress (e*lĕk'trĕs) noun [ Confer French électrice . Confer Electoress .] The wife or widow of an elector in the old German empire. Burke. 
the wife or widow of an Elector of the Holy Roman Empire.