Dowager

Webster's Dictionary of the English Language

·noun A title given in England to a widow, to distinguish her from the wife of her husband's heir bearing the same name;

— chiefly applied to widows of personages of rank.

II. Dowager ·noun A widow endowed, or having a jointure; a widow who either enjoys a dower from her deceased husband, or has property of her own brought by her to her husband on marriage, and settled on her after his decease.